TeamA.P.B.21D

I've been using Mobil 1 Synthetic 5w-30 in my '01 Z28 for three years now. I've been wondering if I should change to a different weight, 5w-30 seems a little thin considering I live in IL and only drive it during the spring, fall, and summer when there's no snow on the ground. In the winter I drive my POS beater, a Plymouth Reliant with over 300K miles on it(It just won't die, it's indestructible!).

Z28Venom

iTrader: (13)

Do a search.. there are hundreds of posts on the subject...

Patman is the resident oil expert.. most of the posts you find will have great info provided by him.

66deuce

iTrader: (1)

i switched to 10w-30synthetic(was using 5w-30 dino oil) about two years ago and have had no problems.in fact,my oil consumption dropped quite a bit.

z2802sunsetls1

redline 5w30

INMY01TA

iTrader: (1)

I use Redline 10w30 cause, well, it's the best. Nothing wrong with Mobil one at all. (I'd use 10w30 for sure though)

crainholio

iTrader: (2)

The GM LS1 crate motor installation guide specifies 10W-30 synthetic oil. Kinda interesting what the General likes when CAFE standards aren't involved.

Patman seems to like the German-made variant of Castrol Syntec 0W-30, and so do I now that I'm using it. My '02 Silverado is quieter than it was with Amsoil 5W-30, and the LS1 I just finished swapping into my '82 Z28 is nice 'n quiet also. When I hit the road course this season, I'll be running Mobil Delvac-1 5W-40.

JoSeY

ROYAL PURPLE IS THE ONLY OIL I HAD IN MY CAR AND I MADE OVER 440HP ON A MILD TUNE, STAGE 2 MTI HEADS AND AN X1..MY CAR (if the truck driver didn't think it was a parking spot) would still be making this HP @ over 110,000 miles.

LASTLS1

iTrader: (7)

Go the 10-30. Mobil is good. AMSOIL is best. But go with the 10-30.

JoSeY

Amsoil didnt measure up to RP....10-30 is a safe all weather oil...here in Htown...10/40 is a must in the summer....

Patman

My top recommendations are German Castrol 0w30, Redline 5w30 or Amsoil 0w30 or 5w30.

Trans Am 2 N V

Patman dont you get tired of answering the same question

Do you have a automatic saying everytime you see a oil post, they are always the same

i havent been able to find the German castrol so I run the Redline 5w30

Sonny

iTrader: (1)

anyone here uses schaeffer's 7000 blend 10w30?

Patman

I was using that in my LT1 last year actually, and also tried their 5w30. I got good results, but have gotten better results since switching to the 0w30 Castrol.

I have seen an LS1 oil analysis running Schaeffer 10w30 though and it looked incredibly good, it had very low engine wear.