If anyone missed it, my oil level is also rising. This change it was about 1-2cm above the F mark on the dipstick. FWIW, I don't have an OMP.
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Oil control rings can definately contribute to the problem. As well as bad sideseal clearance. A rich tune/flooding can contribute as well.
On turbo cars this is very common, due to positive manifold pressures and richer mixtures under boost. |
Originally Posted by nik
Oil control rings can definately contribute to the problem. As well as bad sideseal clearance. A rich tune/flooding can contribute as well.
On turbo cars this is very common, due to positive manifold pressures and richer mixtures under boost. |
It's normal for some gas to get in the oil no matter what, but this sounds like more than normal for a non turbo. I don't remember if you said it was ported or not, but some porting styles can contribute to this(the ones that go into the oil control rings).
I wouldn't be too worried, maybe consider running a higher quality oil and change it more often. I change every 5000 km and run mobil 1 15W50. Mine comes out black and smelling like gas every time, as does most turbo rx-7. |
Originally Posted by nik
It's normal for some gas to get in the oil no matter what, but this sounds like more than normal for a non turbo. I don't remember if you said it was ported or not, but some porting styles can contribute to this(the ones that go into the oil control rings).
I wouldn't be too worried, maybe consider running a higher quality oil and change it more often. I change every 5000 km and run mobil 1 15W50. Mine comes out black and smelling like gas every time, as does most turbo rx-7. |
Originally Posted by My5ABaby
Blackstone Labs. http://www.blackstone-labs.com/
They'll send you a free "kit" to put your sample in. You just send it back with oil (3 oz. or so) and $22.50. A couple days later you get the results. |
1 Attachment(s)
Here's another comparable. Engine has 70K original miles on it. Good compression. Not raced as Blackstone states, but run at a half dozen track days a year. They misinterpreted my comments on the sample submission form.
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