Synthetic oils
 

I am replacing the cam and crank seals along with timing belt and waterpump on my 96 LSi with 60k.The rear seal is leaking a little bit so I ordered one and will replace it soon.I would like to switch the car over to synthetic. My 93 Legacy turbo has had syn. since new and now has 151k runs great and NO oil leaks.Would I have problems with valve seals? I have heard switching to syn. from dino oil can cause seal probs. Any comments would be greatly appreciated. Also the car had a bad pillow ball bushing in the rear lateral link.I am replacing them both, but I wondered if this is common. Wheel bearing seem OK though(knocks on wood)
Thanks BillC

Synthetics are just typically more slippery than straight mineral oils, hence the oil control problems, especially with older, harder seals. Try it and see how it works out for you, the worst thing that could happen is you may want to go to a blend or regular motor oil.

Bill, I'd be curious to know what you'll pay for the belt/seals/waterpump work. I'm gonna' do the same thing soon. My '92 with 100K began oozing oil about 10K ago. I've been running synthetic since I bought it with 76K. My mechanic said if seals are marginal, the synthetic will find a way to leak.
Good luck, Ron.

The parts altogether were probably 250-275. The reason I dont know for sure is because I ordered other stuff too. I always do my own work so labor is just time, which is valuable,but I know if I do the work, it is being done right,and carefully. I know there is a lot of dedicated, talented techs out there. I just havent found one so I gave up. When I do find one I will have more time,but I think I might miss messing with my Subies. BTW, Thanks for the tip Beav, you answered my question. Thanks, BillC

My mechanic knows a guy with an Integra that switched over to synthetic oil at 200,000mi without any leaking. An engine with 60k shouldn't have any problems.

Matt

That would be a unique situation.