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post #1 of 10 (permalink) Old 10-25-2006, 05:29 PM Thread Starter
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Pinging

Can poor quality gasoline combined with an almost bone dry tank cause pinging?

96' 4.6l LX Sport - Modding put on hold for awhile
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post #2 of 10 (permalink) Old 10-25-2006, 06:43 PM
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Yes. Low quality gas in itself has the potential to cause some pinging, but running really low on gas could have caused you to run lean, and running lean would increase combustion chamber temps, thereby increasing the chance for detonation.

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post #3 of 10 (permalink) Old 10-25-2006, 06:46 PM
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Fill-er-up with a fresh tank of high test and see if it goes away. :shrug:

Stay away from the mid-grade stuff. Almost nobody runs it and it can end up sitting in those underground tanks for months at a time.

~Brian~


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post #4 of 10 (permalink) Old 10-25-2006, 07:15 PM Thread Starter
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Yeah I had an eighth of a tank and the gas was from a station that's well, a dump. So I filled up wit premium and no probs. Thanx.

96' 4.6l LX Sport - Modding put on hold for awhile
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post #5 of 10 (permalink) Old 10-25-2006, 09:50 PM
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Quote:
Originally Posted by Mod Motor Cat
Fill-er-up with a fresh tank of high test and see if it goes away. :shrug:

Stay away from the mid-grade stuff. Almost nobody runs it and it can end up sitting in those underground tanks for months at a time.
Actually there is no such thing as "mid-grade" gas. The gas is half premium and half regular unleaded. It is mixed as it comes out the pump into the car.

Currently In the Short Bus Garage:
2 - '94 T-bird LX's 4.6L (one with 300,000+ miles and one with 200,000+ miles)
1 - '97 Mark VIII LSC - INTECH V8 (120,000+ miles)
1 - '97 F150 XLT 4x4 Flareside, 4.6L (130,000+ miles) - Currently being dismantled and rebuilt with upgrades!
1 - '00 Mustang GT (likes to accelerate with the brake on!), 4.6L (60,000+ miles - only comes out when I need to get somewhere fast.)

oh yeah, and they all have 4R70W's
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post #6 of 10 (permalink) Old 10-25-2006, 10:48 PM
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so if that is the case, why doesn't 93 octane + 87 octane = 90 octane? because where i live, mid-grade is 89 octane, not 90
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post #7 of 10 (permalink) Old 10-26-2006, 07:47 AM
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so if that is the case, why doesn't 93 octane + 87 octane = 90 octane? because where i live, mid-grade is 89 octane, not 90
Because Octane Ratings are simply integer averages. . . . . .This is the whole math thing such as "For sufficiently large values of '2', 2+2=5". Just because the gas you pump is rated at 85, 86, 87, 89, 90, 91, etc. doesn't mean that you are actually getting that octane. . . . .this makes us feel really good about the gas we're getting, huh?

Currently In the Short Bus Garage:
2 - '94 T-bird LX's 4.6L (one with 300,000+ miles and one with 200,000+ miles)
1 - '97 Mark VIII LSC - INTECH V8 (120,000+ miles)
1 - '97 F150 XLT 4x4 Flareside, 4.6L (130,000+ miles) - Currently being dismantled and rebuilt with upgrades!
1 - '00 Mustang GT (likes to accelerate with the brake on!), 4.6L (60,000+ miles - only comes out when I need to get somewhere fast.)

oh yeah, and they all have 4R70W's
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post #8 of 10 (permalink) Old 10-26-2006, 10:10 AM
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Quote:
Originally Posted by wether
Actually there is no such thing as "mid-grade" gas. The gas is half premium and half regular unleaded. It is mixed as it comes out the pump into the car.
Tell that to Esso oils. They used to supply fuel to the station I worked as as a kid and there was a separate in ground tank specifically for Mid Grade fuel.

~Brian~


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post #9 of 10 (permalink) Old 10-26-2006, 10:21 AM
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Haven't seen any of that in TX. . . . .maybe it just depends on the type of pump and/or age of the station. I have only dealt with new installations/buildings.

Currently In the Short Bus Garage:
2 - '94 T-bird LX's 4.6L (one with 300,000+ miles and one with 200,000+ miles)
1 - '97 Mark VIII LSC - INTECH V8 (120,000+ miles)
1 - '97 F150 XLT 4x4 Flareside, 4.6L (130,000+ miles) - Currently being dismantled and rebuilt with upgrades!
1 - '00 Mustang GT (likes to accelerate with the brake on!), 4.6L (60,000+ miles - only comes out when I need to get somewhere fast.)

oh yeah, and they all have 4R70W's
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post #10 of 10 (permalink) Old 10-26-2006, 10:53 AM
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The Citgo I buy from has seperate tanks as well. BTW, unless you like replacing your fuel pump , don't keep running your tank real low, the fuel acts as a coolant for the pump!

Bob
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