WisconsinMonSTAR
Proven Member
- 129
- 29
- Apr 20, 2014
-
Kenosha,
Wisconsin
Hello all! I am somewhat stumped as to my engine's rate of oil consumption.
My car uses quite a bit of oil between changes. Over 2 quarts per 3k miles.
My compression test yielded 150 +/- 3 on various cylinders. Spark plugs have zero buildup; they look great after over 5k miles of rigorous driving (I race on the weekends and take frequent freeway trips). My exhaust does not spew any color of smoke. Not after long idles, not when I go WOT, not when I decel, or even when I decel and follow up by going WOT immediately after. I have also had my girlfriend start the car in the morning while I watch the tailpipe, and there is not a puff of smoke.
My oil pan is slightly grimy around the edges, but never does it leave any drips, or have any freshly wet looking oil. It just looks like grime stuck to mildly wet spots. Valve cover gaskets are all good and new.
Turbo has zero shaft play, pcv valve recently changed with a new oem unit, and crankcase breather (inline fuel filter on the vacuum line leading to intake tube) is pretty clean.
I cant figure out why my car is occasionally low on oil. Maybe I have a leak that only comes while driving? Or a leak that drips onto the downpipe and immediately burns off? Valve stem seals?
I plan on resealing my oil pan in the springtime, as well as doing a deep nook and cranny inspection for small leaks.
What else could be the issue here? The amount of oil I am having to add is far too much for me to suspect a large leak, considering I should be able to find it quite easily if that were the case. Also, with the amount of oil I am losing, I would expect to be seeing smoke clouds, especially when I am in WOT.
Any suggestions would be appreciated. Thanks!
My car uses quite a bit of oil between changes. Over 2 quarts per 3k miles.
My compression test yielded 150 +/- 3 on various cylinders. Spark plugs have zero buildup; they look great after over 5k miles of rigorous driving (I race on the weekends and take frequent freeway trips). My exhaust does not spew any color of smoke. Not after long idles, not when I go WOT, not when I decel, or even when I decel and follow up by going WOT immediately after. I have also had my girlfriend start the car in the morning while I watch the tailpipe, and there is not a puff of smoke.
My oil pan is slightly grimy around the edges, but never does it leave any drips, or have any freshly wet looking oil. It just looks like grime stuck to mildly wet spots. Valve cover gaskets are all good and new.
Turbo has zero shaft play, pcv valve recently changed with a new oem unit, and crankcase breather (inline fuel filter on the vacuum line leading to intake tube) is pretty clean.
I cant figure out why my car is occasionally low on oil. Maybe I have a leak that only comes while driving? Or a leak that drips onto the downpipe and immediately burns off? Valve stem seals?
I plan on resealing my oil pan in the springtime, as well as doing a deep nook and cranny inspection for small leaks.
What else could be the issue here? The amount of oil I am having to add is far too much for me to suspect a large leak, considering I should be able to find it quite easily if that were the case. Also, with the amount of oil I am losing, I would expect to be seeing smoke clouds, especially when I am in WOT.
Any suggestions would be appreciated. Thanks!