My 95 is syntehtic through and through......Just switched to Mobil 1 Synthetic 10-30 at 218K....and now I'm at 220......

My trans I swapped to Mobil 1 Full Synthetic ATF earlier in the summer, but I also only had MAYBE 20-25K on that trans before the switch and I LOVE THAT STUFF!!!!!

I switched to synthetic around 190k and no problems yet. I would not go past 5k however for the reason that contaminants make their way into the oil and its not good to keep them around.

I switched to synthetic around 190k and no problems yet. I would not go past 5k however for the reason that contaminants make their way into the oil and its not good to keep them around.

Agreed....I actually change my oil every 2-3K....not much more longer than that...It'* in that range for when I have time

Since everyone else is replying...

According to my lab report from the oil from my */C-ed LN3, changed at 5k, the oil itself was still good with plenty of those additive goodies in it, but "insoluables" were slightly high. According to the report and my conclusion, this means the oil filter was about "used up". I'm either going to change it a little earlier or change the filter and top up (probably about a quart).

I don't drive it in winter so moisture isn't an awful concern. If I were to do Hardcore extended changes, I'd still dump all the oil at least once a year.

Been running Mobil 1 for about 20k miles, changing every 5k or a bit before, Mobil 7500 before that (changed every 4500 miles). Delco PF52 filters or the Purolator equal once in a while. I don't go off roading very often, so I'm not worried about it getting knocked off.

Do it! Nothing but praises from my use of Mobil1.

Mos - you'll notice it in the cold starts in winter... if you're not using remote start.

I noticed *Everyone* who replied has switched to synthetic, so let me chime in here, as someone still running dino juice: The advice your friend gave you is bogus. Switching from dino juice to synthetic is not going to harm your engine in any way. People who say that have no idea what they're talking about and are just spreading misinformation. Next time, ask what evidence they have for saying that, because I'd love to hear what they say.

Do like everyone has said here, and have no worries about switching to synthetic. The only legitimate reason not to use synthetic oil is during the first 500 miles of a new or rebuilt engine, when the piston rings need to seat. And after that, you can go synthetic any time you like.

Any changes due to synthetic motor oil are all improvements. Go for it without worry. There are no cases I've ever heard of, of synthetic oil being the cause of damage to an engine. That'* just nonsense.

Don't hold me to this...but a few ASEs have told me that there is no reason to think that anymore. Because cars like Mercedes-Benz, BMW, Jaguar, and Cadillac all come filled with synthetic right from the assembly line. Therefore why can't that be the case of any engine? Or could that just be that the Moly rings don't require dino juice to break in? And standard rings do?

ASEs! UNITE! Please...I know we have some ASEs on here, chime in please.

Again...don't hold me to it...its only what I heard

EDIT: WOOHOO 1200th post!

1199 post there buddy..

Corvettes come from the factory with Mobil1 as well. GTO'* with the same engine do not. They'll both break in just fine, it'* all about what performance/dollar you want.

Ok while we are on the subject of synthetic oil (I dont mean to steal SHOmans thread...sorry if I am ) Should I drop my oil pan to get out any old gunk that may have built up over the years before I change to synthetic oil?? I want to put in Amsoil. and what weight oil should I put in?