can oil vapors change the combustion mixture?

Panhead · Post by **Panhead** » Sun Sep 21, 2008 1:50 am

so can it? its being discussed over on a ford truck forum. i never heard of it but let me quickly explain. with the 302's and 351w's, the pcv hose is directly on top of the #8. with this, some people said that the vapors can change the mixture in the cyclinder. this causes rod, rod bearing failure and holes in the #8 piston. so anybody that has automotive knoledge, please explain to me if you have ever heard of this. i try googling it and all comes up is bunch of oil crap but doesnt explain it. thanks.

jrumann59 · Post by **jrumann59** » Sun Sep 21, 2008 1:03 pm

From what I understand oil vapor is less volatile than gas under that premise it should "add" to the octane level. I know for a fact I have been sucking oil thru the PCV into my manifold for years and the engine is running strong besides burning oil.

60trim · Post by **60trim** » Sun Sep 21, 2008 4:09 pm

I don't think that it changes it that much. On same note, the PCV hose basic purpose in life is to deliver the vapors back to the combustion chamber via the manifold.