Koz

This is probably the best oil available for the IS. I have been holding out for this oil.

Amsoil's new 0w-20 100% synthetic (ASM)

http://www.amsoil.com/StoreFront/asm.aspx

Koz

gassman

I use Amsoil 5-20 high performance syn. Better qualiy oil, change every 5K.

Batmobile

iTrader: (2)

i'm about to change my oil soon...i was looking into oil.... how would you guys compare this to the mobil 1's full synthetic or synthetic blend?? better same worst?

Koz

Mobil 1 has been under fire lately because they use some group III base oils, which makes it NOT pure synthetic. Even using group III in their oil, it still has been proven to provide exceptional protection.

Koz

Lexmex

Agreed. I have stirred up some talk about this on a Japanese car forum down here even though a lot of people swear by Mobil 1 down here. I won't touch the stuff again and will continue using German Castrol 0W30.

Dabigman

Gotta love the oil fanboys!!

lobuxracer

iTrader: (2)

I ran Amsoil 0w-30 in my Supra and immediately developed valve stem seal problems. Not that it isn't a common issue with them, but it was really frustrating that I changed the oil and immediately had issues. I changed back to 10w-30 Red Line and the issue subsided (but only for awhile, I still had to replace the seals).

Gernby

iTrader: (1)

I wouldn't feel comfortable using a viscosity that wasn't "approved" by Lexus due to warranty concerns.

bagwell

+1

I'll stick with 5w-20 or 5w-30

Technique

oil is oil...

Gernby

iTrader: (1)

If you believe that, then you should buy the $1 generic oil from Walmart.

ReLexin

What kind of oil does Lexus use when they change your oil at the dealership???

Gernby

iTrader: (1)

The dealerships are privately owned businesses. I'm sure they use whatever they want.

lobuxracer

iTrader: (2)

I suspect they may have a deal with Castrol. I've heard a couple of dealerships use a Castrol synthetic blend.

BounceNY

iTrader: (9)

^^ The dealer put Castrol in mine for the free 5k service...