Originally Posted By: LeakySeals
Originally Posted By: aquariuscsm
Originally Posted By: dx92beater
Originally Posted By: LeakySeals
Would be nice to know which one, because a high mileage oil won't help much to help if its rings. Have someone start your car in the morning cold and watch the tailpipe. Check for a puff of blue smoke. If you see that, its likely the rubber valve seals which can benefit from a high mileage oil. Worst case if you throw a P0420 theres always the $6 spark plug non fouler exhaust mod.
I usually go with that theory (the puff....well plume) of smoke only on startup that goes away), but I figure it is rings since the valve seals really aren't that exposed to oil due to gravity. So HM doesn't do much for rings eh?
Good to know.
High mileage oils advertise "more cleaning". Wouldn't this help clean the rings if that's what is causing oil burn?
While anything is possible over time, for me, the only noticeable remedy for stuck rings was a piston soak with my favorite solvent brew. And its a great time to replace the intake manifold gasket
But the swelling agents/conditioners in HM oil work awesome on the rubber valve seals after a few OCI's.
I wish that I was able to do that on a boxer motor. No more boxer engines for me. Thanks for all of the info.