Not to jump in here... ok I guess I am jumping in... LoL! Here's what I've been told about synthetic oil from numerous sources. Synthetic is great and is fine for all modern automobile engines once they're broken in (there needs to be a little friction to seat everything in, in a brand new engine). The exception, for some unknown reason is Mazda rotary engines... should not use it). There's only two downsides for everyone else. One... it cost a lot more (but it does last longer) and Two... once you switch over to full synthetic you are supposed to stay on it forever. That's why I usually stick to a super high grade conventional oil like Castrol or go synthetic blend. This gives you better than stock protection and still allows you to go back and forth if you want.phazer said:sounds good but why 5w 30 and it says 5w 20 in the manual why not amsoil 5w 20
I don't think there's any question... if money is no object... synthetic oil is superior. That's why it comes standard in cars like Corvettes & Porsches... oh yeh and the space shuttle. And here's a personal opinion even though I usually use the syn/blend. I think they should make it a law that all automobile lubricants are synthetic. Can you imagine how much oil that would free up year in, year out, across the country to make gasoline? I'd certainly pay a little more at oil change time for the better product if it helped keep gas prices down.danpfay99 said:I'm not trying to 2nd. guess Dodge or anything it's just I have always used 5w30 & never had any problems ,so with me it's just an if it ain't broke don't fix it thing. other than I just like syn. oil over conventional oil.