Official 4.6L MPG thread - Page 3 - TCCoA Forums

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post #61 of 303 (permalink) Old 01-14-2007, 07:58 PM
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Join Date: Nov 2006
Location: Bowie, MD
Posts: 164
City Driving

Engine: 4.6 Liter
City MPG: 11.65
Highway MPG: See Below
Fuel Used: Chevron Supreme (93)
Average highway speed: 25-30
Average Climate: Winter
Mechanical Mods: Silencer gone
Milage on the engine: 130K
Comments: Terrible



Highway Driving

Engine: 4.6 Liter
City MPG: See Above
Highway MPG: 25.8
Fuel Used: Chevron Regular (87)
Average highway speed: 75
Average Climate: Winter
Mechanical Mods: Silencer gone
Milage on the engine: 130K
Comments: Excellent

Hell of a spread ain't it!

http://images19.fotki.com/v358/photo...Tbird01-vi.jpg
1994 White (WT) TBird - 4.6 L SOHC with 4R70W

"Sir, if you were my husband, I would poison your drink."
-Lady Astor to Winston Churchill
"Madam, if you were my wife, I would drink it."
-His reply

Rehab progress link
Today's Progress

Last edited by DScruggs; 01-14-2007 at 08:08 PM.
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post #62 of 303 (permalink) Old 03-06-2007, 11:37 AM
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Engine: 4.6L
City MPG: 15 - 18
Highway MPG: 20 - 25
Fuel Used: 87 octane
Average highway speed: 60
Average Climate: 50 degrees
Mechanical Mods: K&N FIPK, stright pipe exhaust, removed EGR valve, Eibach Springs
Milage on the engine: 140,000
Comments: Run the engine pretty hard, as I want to replace it this summer.

Would larger width and diameter tires affect my fuel mileage?

Last edited by 97V8LX; 03-06-2007 at 11:38 AM. Reason: left info out
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post #63 of 303 (permalink) Old 03-06-2007, 11:54 AM
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Send a message via AIM to 94 Daily Driven 4.6L
Engine: 1.3L
City MPG: 32
Highway MPG: 36
Fuel Used: 87 octane
Average highway speed: 75
Average Climate: 50 degrees
Mechanical Mods: Removed Silencer
Milage on the engine: 160,000
Comments: Aspire 5 speed


Sorry, couldn't resist!!

97 Lincoln Mark VIII LSC (Chip'd, 3.73 T/L... so far... )
97 Ford Aspire (Slow, but getting 36 mpg (f'n Ethenol!! )
84 F250 Dually w/6.9L Diesel (7.3L IDI pending)
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post #64 of 303 (permalink) Old 03-06-2007, 06:03 PM
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As long as we are diverging

Engine: 1.3 L (8,000 redline)
City MPG: 17
Highway MPG: 25
Fuel Used: 87 octane
Average highway speed: 80
Average Climate: 50 degrees
Mechanical Mods: Racing Beat Cat Back
Milage on the engine: 55,000
Comments: 2,900 lbs
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post #65 of 303 (permalink) Old 03-11-2007, 08:26 PM
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Age: 36
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Engine: 4.6 OHC
City MPG: 19
Highway MPG: 29
Fuel Used: 93 octane
Average highway speed: 70 to 75
Average Climate: Baltimore Maryland
Mechanical Mods: Gutted Cats Duel FlowMaster Mufflers
Milage on the engine: 120,352
Comments: I Love This Car

Its Got The Power Of A Sports Car Buts Its Not! It Drive Like A Family Car But Its Not!!! So WHAT IS IT???
------------------THUNDERBIRD-----------------
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post #66 of 303 (permalink) Old 04-01-2007, 12:22 PM
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Replaced transmission...better mileage!

The Red Cougar had a transmission replacement last week, the mileage jumped to 25.98mpg from ~20 on the previous tankfull;

This is with my foot in it, looking for problems!

The rest of my information is above in this thread; this made such a big difference, I thought I'd mention it.

I bet I could bust 35 mpg if I could keep my foot under control...

Red '96 Cougar XR-7 240k mi. '02 4R70W, PST DS : '03 PI engine, 04 maf, 24lb injectors, 2.5" exhaust, '02 4r70w + Jmod, DirtyD0g TC + cooler + 3/8" lines, 255 walbro fp. Alpine system.
Black '96 Cougar XR-7 (Lazarus) 210k mi PI Intake, '02 4R70W, Jmod, PST DS, GrogTune, Konis, Mark LCA+Poly, racecougar Custom Engine Chain, and JL and racecougar Bracing.
Black '97 Tbird Limited Edition, '02 4R70W, 255 walbro, PST DS, PBR Brakes&SS lines, Toicko Blues & Springs, GrogTune.

I'm not Human enough to be human; but I'm trying to fit in, and I'm learning to fake it.

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post #67 of 303 (permalink) Old 04-14-2007, 09:09 PM
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Join Date: Feb 2007
Location: victorville
Age: 36
Posts: 42
Engine:4.6
City MPG:20
Highway MPG:28
Fuel Used:87
Average highway speed:70
Average Climate:desert
Mechanical Mods:none yet
Mileage on the engine:148621
Comments:
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post #68 of 303 (permalink) Old 04-14-2007, 09:29 PM
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Join Date: Mar 2005
Location: DeKalb, IL
Age: 44
Posts: 807
Engine: 4.6 DOHC out of 94 mark(60k)
Highway MPG: N/A
Average:around 15-18mpg combined city/highway
Fuel Used: 91 - 93 Octane..usually Shell/BP
Average highway speed:35-60mph
Average Climate:SPRING 40*/midwest
Mechanical Mods:3.73tl, colderplugs, Murader coverter and SCT tuner
Mileage: Car has 181k

As of 10-20-06 DOHC POWERED
Painted Vista blue as of 08
242hp/251tq
14.39@96.01mph 5-17-08@ Byron Il
RobertP plate modded: 5-23-08
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post #69 of 303 (permalink) Old 04-20-2007, 08:06 PM
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i just got 389 miles to a tank of gas before the check gauge light came on.
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post #70 of 303 (permalink) Old 04-23-2007, 10:09 PM
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wow! i just got 0 miles out of a whole tank! my odometer just broke!

Three Birds are Better than 1! Current rides...
Red 96 LX 4.6 <----> Blue 95 LX 4.6 <----> Pearl 94 LX 4.6 (parts car!)
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post #71 of 303 (permalink) Old 04-24-2007, 01:58 AM
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Join Date: Jun 2006
Location: Los Alamitos, CA
Age: 32
Posts: 2,055
Engine: 4.6 Liter
City MPG: 16
Highway MPG: (estimated at 20, have not roadtripped)
Fuel Used: Shell V*Power (91)
Average highway speed: 25-90mph
Average Climate: Summer (40* - 100*)
Mechanical Mods: tune, exhaust, MSD ign, intake, intake spacer, heatshield, j-mod, 1-pc alum driveshaft, 3.27 gears w/tlok
Milage on the engine: 181K
Comments: Terrible... Approximately 220 miles to the TANKFUL..

I am still using the 3.73 speedo gear but I think the 3.27s only help...

96 Laser Red 4.6L - Custom
Custom Nascar-Inspired Bodykit - 55* Rear Spoiler - J-modded Trans - 80mm MAF - One-Off Diablosport Chipmaster Revolution Chip/Tune W/Toggle - ScanGaugeII Diagnostics & Data Readout - PBR Brakes - Drilled/Slotted Rotors - SC Wheels & Springs - Falken Tires - KYB GR-1 Shocks/Struts - FSTB - RSTB - RTLB - LECB - 60/40 Split Rear - SC Seats - SC Vac/Boost Gauge
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post #72 of 303 (permalink) Old 04-24-2007, 02:13 AM
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Join Date: May 2005
Location: Houston,TX
Age: 28
Posts: 3,210
Engine: 4.6 Liter
City MPG: 16
Highway MPG: 25
Fuel Used: 87 octane
Average highway speed: 70mph
Average Climate: 80*
Mechanical Mods: PI low comp. motor, motorsport wires, Duals, Headers.
Milage on the engine: 4,000
Comments: Its getting better on each tank.

Jim

1995 Thunderbird LX: Vortech S-Trim(12psi), Forged PI 4.6, T-45, SCT Tune, Eibach Pro-kit, Magnaflow DI/DO Exhaust, 3.73 TL, and 17" Cobras

1995 Thunderbird SC: Bone Stock
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post #73 of 303 (permalink) Old 04-24-2007, 02:13 PM
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Join Date: Mar 2005
Location: Orlando
Posts: 1,522
Engine: 4.6
City MPG: 22.3MPG last tank
Highway MPG: unknown with new tune
Fuel Used: 87
Average highway speed: 80MPH
Average Climate: Florida hot and humid
Mechanical Mods: Pi intake and cams
Milage on the engine: 160K
Comments: Wife took a new job location that puts 50 miles per day on the car all city stop and go driving. Performance tune was giving 16.5mpg on this drive, stock tune gave 17.5mpg give or take, after 50+ iterations did 22.3mpg last tank all city on a very aggressive mileage tune (SCT software). Still tweeking the tune as well. Future mods include U/D pulleys to see if any gain there, then a 3.73 gear pumpkin is going in which should help the city mileage since her top speed is 40MPH and average speed is around 30MPH. A couple more months should see the new motor installed since this one is blowing blue smoke nearly all the time now.
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post #74 of 303 (permalink) Old 05-09-2007, 03:43 PM
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new milage

Quote:
Originally Posted by midwestbird View Post
Engine: 4.6 DOHC out of 94 mark(60k)
Highway MPG: N/A
Average:around 15-18mpg combined city/highway
Fuel Used: 91 - 93 Octane..usually Shell/BP
Average highway speed:35-60mph
Average Climate:SPRING 40*/midwest
Mechanical Mods:3.73tl, colderplugs, Murader coverter and SCT tuner
Mileage: Car has 181k
put in 4.10s and got 21.1mpg.. That was combine town and rural roads

As of 10-20-06 DOHC POWERED
Painted Vista blue as of 08
242hp/251tq
14.39@96.01mph 5-17-08@ Byron Il
RobertP plate modded: 5-23-08
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post #75 of 303 (permalink) Old 06-20-2007, 01:55 PM
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Join Date: Aug 2005
Location: Allentown, Pennsylvania
Posts: 13
Engine: 97 sohc 4.6L V8
City MPG: 18
Highway MPG: 26
Fuel Used: 87 octane, usually from Shell
Average highway speed: 65-75
Average Climate: PA, so anywhere from 95 degrees in summer to 5 in winter
Mechanical Mods: none
Milage on the engine: 75,000
Comments:
Only modification is the intake manifold was replaced with an aluminum crossover instead of the stupid plastic one.

Mpg drops 2or3 when making short trips in the extreme cold, probably because it takes the engine a while to warm up when its only 9 degrees outside.
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post #76 of 303 (permalink) Old 07-10-2007, 02:43 PM
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Join Date: Dec 2004
Location: memphis
Age: 56
Posts: 139
Smile

Engine: 95 sohc 4.6L V8
City MPG: 18
Highway MPG: 28
Fuel Used: 87 octane, from Shell
Average highway speed: 70-75
Average Climate: memphis,hot as hell in the summer and ok in the winter
Mechanical Mods: none
Milage on the engine: 188K
Comments: purchased this car off of ebay...have had it 2 years am very pleased with it,just wish she had alittle more ooommph to her

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post #77 of 303 (permalink) Old 07-11-2007, 03:57 PM
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95's own for gas mileage! My 95 T-Bird just got 29-30 MPG running 78 MPH, and 23.5 in the city. But my woman's 96 Cougar only gets 25-26 on the highway.

Mine get's a LOT better mileage in the summer, the hotter the better, doesnt matter if the A/C is on.

Al

97 T-Bird LX 4.6 - 68k miles
94 Supra TT Auto - street/strip car
04 Crown Vic Police Interceptor - Brenda's car
Previous cars:
95 T-Bird LX 4.6 - fully optioned, owned 15 years
96 Cougar XR-7 4.6- Brenda's car, owned 11 years
88 T-Bird 3.8 - first T-Bird, owned 5 years
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post #78 of 303 (permalink) Old 07-12-2007, 10:22 PM
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Join Date: Oct 2003
Location: Ames, IA
Age: 40
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Engine: 1995 4.6L
City MPG: 18 mpg ish
Highway MPG: 23 mpg ish
Overall MPG: 21.10 MPG over 58099.27 miles. (yes, I kept track!)
Fuel Used: mostly 89 octane, 10% ethanol
Average highway speed: 70 mph.
Average Climate: 10 in winters to 90 in summers. Iowa
Mechanical Mods: none
Milage on the engine: 219k.
Comments:
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post #79 of 303 (permalink) Old 11-23-2007, 08:38 PM
No, Mr. Lemmywinks, No!!!

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Everybody loving the winter gas this year?

My gas mileage is down ~15-20%. They must be adding a sh*tload of ethanol to the mix this year...

Anybody else seeing this, or did we just recently get in on the fun?

I'm used to a 5%-10% change, but along with $3.15/g gas, it's a drag.

Red '96 Cougar XR-7 240k mi. '02 4R70W, PST DS : '03 PI engine, 04 maf, 24lb injectors, 2.5" exhaust, '02 4r70w + Jmod, DirtyD0g TC + cooler + 3/8" lines, 255 walbro fp. Alpine system.
Black '96 Cougar XR-7 (Lazarus) 210k mi PI Intake, '02 4R70W, Jmod, PST DS, GrogTune, Konis, Mark LCA+Poly, racecougar Custom Engine Chain, and JL and racecougar Bracing.
Black '97 Tbird Limited Edition, '02 4R70W, 255 walbro, PST DS, PBR Brakes&SS lines, Toicko Blues & Springs, GrogTune.

I'm not Human enough to be human; but I'm trying to fit in, and I'm learning to fake it.

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post #80 of 303 (permalink) Old 11-24-2007, 03:50 AM
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I don't know yet as I haven't been driving my new tbird long at all... plus not having cruise control doesn't help. I need to hurry up and put the module back in and hook it up. Damn Bullitt Intake.

96 Thunderbird Specs

Project Under Construction
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post #81 of 303 (permalink) Old 11-25-2007, 07:42 PM
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Quote:
Originally Posted by ry2lazy4u View Post
wow! i just got 0 miles out of a whole tank! my odometer just broke!
Haha - right there with ya!

Eibach 1.5" Lower Springs, Koni Adjustable Shocks, SCP IRS Brace, SCP Lower Engine Cradle Brace, Mark VIII LCAs
Chuck's Poly Motor Mounts, 13" PBR Front and Cobra rear brakes, 245-45-18 ADR Kasai Wheels, RichardM Intake Tube
Super Coupe leather seats and console, Pioneer Head, Audison Amps, Boston SL Components, 10" Boston G5 subs, Reverse Glow EL Gauges, Super Coupe Ground Effects, '96 Hood and Headlights, Custom paint: Tungsten Silver, PI Intake, 4000 stall
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post #82 of 303 (permalink) Old 12-19-2007, 10:18 AM
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Join Date: Nov 2007
Location: rochester mn
Age: 32
Posts: 663
Engine: 4.6
City MPG: 17 winter 21 summer
Highway MPG: 22 winter 26 summer
fuel Used: 92
Average highway speed: 60
Average Climate: -0s to 90s
Mechanical Mods: maf flipped
Milage on the engine: 192700
Comments: it has a very oem ford looking sticker that says "reprogrammed by ford" no idea what for. also got horrible mileage (6-8) when i used to go up and down broadway friday nights looking for ricers and mustangs that think they are so hot with their big wings and shiney rims

Shipping out to basic training for the army on april 12th!

Bird is on serious down time
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post #83 of 303 (permalink) Old 12-23-2007, 08:51 PM
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dude, put your maf back on the way its supposed to be and dont mess with it in any way what so ever.....trust me
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post #84 of 303 (permalink) Old 12-25-2007, 06:46 AM
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Posts: 74
engine 4.6 stock
city hwy 21-23
hwy 28
hwy speed 75 mph
mileage 65000 140000
I used to check my mileage until one day I notice the odemeter wasn't working, then it was working I don't the percentage of working vs not but it make the mileage moot. also I bought another 95 bird with 180000 on it same problem. Has anyone else had the same problem
By the way the speedo works
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post #85 of 303 (permalink) Old 12-27-2007, 10:41 AM
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Join Date: Nov 2007
Location: Boise, ID
Posts: 7
Engine: 1995 4.6L

City MPG: First tank since I bought it, 14.85 MPG

Highway MPG: Haven't highwayed enough to tell

fuel Used: 87

Average highway speed: 70

Average Climate: 20-100 (been about 20-30 everyday since I bought it)

Mechanical Mods: bone stock

Milage on the engine: 30,995 (seriously)

Comments: Hoping the mileage will increase a little since this is the first fresh tank after the car pretty much sat in the garage for the last couple years almost never driven. Already did an oil change and topped off all the fluids and all that. After it warms up outside (don't want to do this in the snow) I suppose I'll do an all fluid flush, new plugs and wires, and new battery. Might consider doing the cold air K&N/silencer removal, though I'm seeing conflicting statements regarding the benefits of that, some say does nothing, some say helps MPG a couple.
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post #86 of 303 (permalink) Old 01-01-2008, 10:42 PM
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Location: Cisco, TX
Age: 37
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I made a trip to Abilene, TX and decided to use this as a chance to check my mileage since my odometer isn't working. I did both legs of the trip under different circumstance to see what would happen.

On the way to Texas;
Engine: 4.6L V8
City MPG: Unknown since this was pretty much just a highway trip.
Highway MPG: 23
Fuel Used: 87 octane but I did fill up at a gas station once that used 10% ethentol
Average highway speed: 80-ish
Average Climate: Fair but slightly cool
Mechanical Mods: K&N Panel filter and gutted cats.
Milage on the engine: about 100,000
Comments: I tried to keep up with the flow of traffic and that seemed to be about 85 mph. I guess we were all in a hurry to make it home for X-Mas. I had a bit of weight in the trunk that was made up mostly of gifts. The tires were a little flat but I didn't notice that until after I was pulled over in Texas for speeding. I started going closer to the speed limit in Texas. They were trying to crackdown on drunks so I got away with a warning.

On the way back to North Carolina;
Highway MPG: 25
Fuel Used: 87 octane all the way
Average highway speed: 70-ish
Average Climate: Cooler with a lot of overcast.
Comments: Even with the aired up tires the milage suffered because of the extra weight in the car. This trip included over a 150 lbs of tools, an aquarium stand, 21 gallons of water, and a 29 gallon tank with gravel. The back end looked like it was barely off the ground. That and the tinted glass made my car look suspicious I guess because we were pulled over in Louisiana. We were let go without a warning. Just a note to try to pay attention to local laws even if you can't just pull off the tint in states like that.

Overall I'm sure without the weight my car gets 27 mpg on the highway but until I fix the odometer I can't be too sure what my city mileage would be. Luckily I mostly just use the highway to get back and forth to work.

-Randy-
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post #87 of 303 (permalink) Old 01-18-2008, 10:45 AM
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Join Date: Dec 2007
Location: Long Island, NY
Posts: 62
Engine: 4.6L SOHC
City MPG: 10-12
Highway MPG: 12-15
Fuel Used: 87
Average highway speed: 65.2Mph
Average Climate: Winter gets down in the twenties with snow summer gets up into the 80's and 90's.
Mechanical Mods: None
Milage on the engine: 160K
Notes: I have a bad O2 sensor.
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post #88 of 303 (permalink) Old 01-30-2008, 09:36 PM
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Location: Inland Empire, CA
Age: 31
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i keep forgetting to keep my gas receipts so i dont have any solid figures to give a good estimate of my mpg but i was wondering... i have have an automatic, does manually downshifting affect gas mileage in any way?
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post #89 of 303 (permalink) Old 01-30-2008, 11:14 PM
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Quote:
Originally Posted by fullride85 View Post
i keep forgetting to keep my gas receipts so i dont have any solid figures to give a good estimate of my mpg but i was wondering... i have have an automatic, does manually downshifting affect gas mileage in any way?
dont do it.

you dont need a gas receipt, tank is 17 gallons, just press the trip meter button and do some math.

"Booyah". Stu Scott.
1996 Braincoated, all Aluminum PI powered and obscenely loud Pearl White Tbird 14.17@98.57mph AKA Dyrdek.
2013 Black on black FX2 Supercrew Ecoboost F150. Roll onto the scene with the ceiling missing.
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post #90 of 303 (permalink) Old 01-30-2008, 11:15 PM
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Quote:
Originally Posted by Peppers30 View Post
Engine: 4.6L SOHC
City MPG: 10-12
Highway MPG: 12-15
Fuel Used: 87
Average highway speed: 65.2Mph
Average Climate: Winter gets down in the twenties with snow summer gets up into the 80's and 90's.
Mechanical Mods: None
Milage on the engine: 160K
Notes: I have a bad O2 sensor.
my truck gets almost 16mpg in town and 20.2mpg on the highway....

"Booyah". Stu Scott.
1996 Braincoated, all Aluminum PI powered and obscenely loud Pearl White Tbird 14.17@98.57mph AKA Dyrdek.
2013 Black on black FX2 Supercrew Ecoboost F150. Roll onto the scene with the ceiling missing.
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