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post #1 of 14 (permalink) Old 09-17-2006, 08:53 PM Thread Starter
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Losing oil

My car is loosing oil somewhere. I never see it on the ground and the valve covers are dry so I'm assuming its burning it. However, theres never any smoke in the exhaust but when I change my oil, its always low. Is there anything I can do to help this out or do I need to just keep an eye on it?
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post #2 of 14 (permalink) Old 09-17-2006, 09:41 PM
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4.6 engine losing oil average about 1 quart per 1000-1500miles.

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post #3 of 14 (permalink) Old 09-17-2006, 11:24 PM
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Try this, after you get it up to operating temperture, sit at idle in gear for 35 seconds, then gun it and see if you are smoking the world for mosquitos.

That is a very common issue with the early 4.6. Basically sit at a light, then take off, that is when it shows up the most. It is usually from worn out valve seals.

Some people use a "heavier" oil, like 10w30, this is one of the reasons that the high milage oils (Valvoline MaxLife for example) are around.

Is it more than a quart low in 3k to 5k miles? I PERSONALLY hate it when a car uses oil, but a quart every 1000 miles is not considered excessive by Ford (depends on the car, engine, etc) for something like my 2000 Grand Marquis.

I think the 1 pint low at 3,500/4,000 in my 89 Cougar is excessive, but I guess it really isn't.

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post #4 of 14 (permalink) Old 09-17-2006, 11:58 PM
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I think i have the record then, it was three quarts per 3000 miles thats 1 quart every 1k. I never saw any on the ground or any leaks but it went somewhere. Have somebody follow you and then hammer on it. Thats how i found out it was valve seals, i think, never took the motor apart to see.

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post #5 of 14 (permalink) Old 09-18-2006, 06:40 AM Thread Starter
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I'm pretty hard on it and I've never seen any smoke out of it. I use MaxLife and for the summer I've been using 10w30. I'll be going back to 5w30 for the next change though. I might add a quart of full synthetic as well. Anybody ever try that?
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post #6 of 14 (permalink) Old 09-18-2006, 08:39 AM
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If you mean addding a quart of synthetic with regular oil dont do that they should not be mixed.

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post #7 of 14 (permalink) Old 09-18-2006, 12:31 PM
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Not only should you never mix them, you should never use synthetic oil in a car that has been running normal oil for a good amount of time. It will break up build up from the old oil and that will go through your engine, causing some damage. You don't want old chunks floating through your engine.

Sure, some people have done it, heard of someone who has done it, etc., and didn't have any problems, but then there are the ones that have done it, heard of someone who has done it, etc., that DID have problems. On a brand new, clean engine, I would want to run synthetic. Talk about keeping your engine clean, but other than that, stick with what's been in it.
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post #8 of 14 (permalink) Old 09-18-2006, 01:22 PM
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Quote:
Originally Posted by IcemanV8
Not only should you never mix them, you should never use synthetic oil in a car that has been running normal oil for a good amount of time. It will break up build up from the old oil and that will go through your engine, causing some damage. You don't want old chunks floating through your engine.

Sure, some people have done it, heard of someone who has done it, etc., and didn't have any problems, but then there are the ones that have done it, heard of someone who has done it, etc., that DID have problems. On a brand new, clean engine, I would want to run synthetic. Talk about keeping your engine clean, but other than that, stick with what's been in it.
If they shouldn't be mixed then why do they sell "blends"?. . . . .just asking.

I use Castrol Syntec Blend on one of my '94 T-birds and Castrol Syntec on all of the other vehicles and have had no problems with the oil in a few hundred thousand miles on any vehicle. The one car with the Syntec Blend in it had a small leak at the gasket for the oil filter extension housing when I bought it. It finally started using more than a quart between oil changes and spent the 5 or so dollars on the gasket and a few hours to replace the gasket.

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oh yeah, and they all have 4R70W's
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post #9 of 14 (permalink) Old 09-18-2006, 02:26 PM
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Quote:
Originally Posted by IcemanV8
Not only should you never mix them, you should never use synthetic oil in a car that has been running normal oil for a good amount of time. It will break up build up from the old oil and that will go through your engine, causing some damage. You don't want old chunks floating through your engine.

Sure, some people have done it, heard of someone who has done it, etc., and didn't have any problems, but then there are the ones that have done it, heard of someone who has done it, etc., that DID have problems. On a brand new, clean engine, I would want to run synthetic. Talk about keeping your engine clean, but other than that, stick with what's been in it.
I switched from regular to full synthetic in my 99 RT with 96,000 miles on the clock. I switched my 94 Thunderbird over to sythetic at around 90,000 miles. Never any issues (except for the driving in the water by accident thing)

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post #10 of 14 (permalink) Old 09-18-2006, 08:45 PM
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Quote:
Originally Posted by Runner383
I switched from regular to full synthetic in my 99 RT with 96,000 miles on the clock. I switched my 94 Thunderbird over to sythetic at around 90,000 miles. Never any issues (except for the driving in the water by accident thing)


I switched mine to full synthetic from regular oil and have had no problems, and that was 7,500 miles ago. And whether makes a good point. A "blend" is like 1/2 synthetic 1/2 conventional.

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post #11 of 14 (permalink) Old 09-19-2006, 08:28 AM
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I would definately not recommend doing a 50-50 blend. I have never measured the viscosities but i would put money on the fact they are very different as well as the densities are probably very different also ie oil on water. It strikes me that its only a matter of time before the motor gives out.

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post #12 of 14 (permalink) Old 09-25-2006, 06:05 PM
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Don't ever mix oil types or weights---if you do, you might as well throw in a quart of laundry detergent . When you mix oils, you can cause foaming that will create cavitation throught your oil pump and will not properly oil your heads. I have seen what damage this can do to cams on a Chevy 350 w/ overhead cams---When I worked in a parts store I saw this kid come in to buy stuff for his car all the time--this 16year old thought it would be a good idea to add synthetic into his car that was running on standard oil. He would buy fuel addatives by the case, and added every possible dress-up item he could buy. Oh yeah, he also thought that buying all chrome parts for his Camaro would add horse power---I love commissions. I switched jobs shortly after he got his new Integra and was asking bout nitrous kits.......Im sure this was a great new story in the making...Don't you love how stupidity inevitably leads to Natural Selection ?..... ....hahahaha.
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post #13 of 14 (permalink) Old 09-25-2006, 06:13 PM
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Oh yeah,

I forgot to mention: I too go through at least a quart per 1,000 miles. The leaking valve seals are a nice touch when you are in front of a tail-gater in traffic....I will give it a nice romp between stops and leave him a little something to suck on when his A/C is going. Just keep an eye open for coupons, rebates and any other oil specials your local parts store pops out for oil. I stick with 10w30 year round.
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post #14 of 14 (permalink) Old 09-27-2006, 07:32 PM
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Quote:
Originally Posted by IcemanV8
Not only should you never mix them, you should never use synthetic oil in a car that has been running normal oil for a good amount of time. It will break up build up from the old oil and that will go through your engine, causing some damage. You don't want old chunks floating through your engine.

Sure, some people have done it, heard of someone who has done it, etc., and didn't have any problems, but then there are the ones that have done it, heard of someone who has done it, etc., that DID have problems. On a brand new, clean engine, I would want to run synthetic. Talk about keeping your engine clean, but other than that, stick with what's been in it.

So you have never done the Seafoam thing in your car?

That is exactly what that does; (Break all the crap loose) It makes a major difference...or at least it did to me...that was the dirtiest oil I've ever seen, that came out after the Seafoam oil change/seafoam intake/ seafoam gas treatment job I did. Car felt new...

I use synthetic on everything; it makes a large difference in gas milage, 3-4 mpg, and the engine feels smoother.

I changed my 63 bird from quaker state to castrol, years ago, and it made a major difference too, but I had the valve covers off, and cleaned all the solidifies paraffin out first; THAT would have probably killed the engine, for sure, if I hadn't got that out...

I did a post in a thread about quaker state oil; search for it...You sound a lot like my Dad's mech did, before I showed him all the crap out of my engine...

YMMV...

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