MoogieBoogie

I was going to switch to synthetic oil, but after reading a few threads here, it appears that with higher mileage, there is a high possibility for the seals to leak.

I changed out the front main seal recently. Would it now be OK to switch over to synthetic? Anything else I should? I mainly want synthetic for the extra protection, although I do change out my oil every 2500-3000 miles.

Thanks and sorry for the repetitiveness of this question.
-Brian.

TGRich

Depends on the car and the condition of the seals. SC's are somewhat notorious for the rear main seals going out. The higher the mileage, the higher the risk of a leak. You could always try it and find out. You'll know it wasn't a good idea if you see drops in the driveway or when you go to change the oil next time, theres some oil blown back onto the bottom of the tranny.
I switched over and now chang my oil every 4k, instead of 3k- it still comes out fairly clean.

mrshabo

question... would having oil missing from your engine be signs of a leaking seal? The problem with me is that there is no oil dripping on the ground.... but the oil seems to disappear...

BLK13X

Oil seems to disappear?

That reminds me I need to get my service done

Fred Smith

Oil disappearing probably means you are burning it.

I switched to synthetic in my V8 and now notice a couple of drips in the driveway. When the trans comes out I will replace the RMS, and when the heads come off I will do the FMS. Hopefully the rings are OK.

mrshabo

my exhaust gas seems to smell different than it normally does.. kinda smells like how my friend's supra smells, he has all his cats removed.. it doesn't smell as bad though.. that help at all?

TGRich

I wouldn't say you're burning it necessarily if you're missing oil. That's a possibility, but so is this: If your seals aren't that bad and only leak oil when the system is pressurized and hot. I would check your exhaust and if it looks smoky or bluish at all, then I would say you're burning it.

I'm no expert, but I would say the 2 biggest ways for loosing oil would be a bad seal or valve seal or something like that.

mrshabo

not smokey or blue at all...