Oil recomendation for my vehicles?

Joined
Jul 7, 2009
Messages
32
Location
Virginia Beach
Car 1: 2001 Z06 Corvette with approx. 440 rwhp. - 84,xxx miles Former HPDE car 4-5x a year, but now retired to nice weather commuter and weekend toy. Ran M1 5w30 initially but started experimenting w/ thicker oils when oil consumption became and issue. Had the car re-ringed in 2004 under warrnty and switched to M1 0w40 at that time. Eventually I switched to Amsoil 5w40 w/ a K&N filter and have run that for years. Last weekend I went back to a M1 extended performance filter and regular M1 synthetic 5w30 simply because the car isn't tracked anymore and the M1 is available right down the street vs. ordering. The car will get the oil changed ever 5k or once a year I guess. Car 2: 2004 GMC Canyon DD/Toy hauler - 57,xxx miles I inherited this from my grandfather in early '07 with 11k on it. I have been using M1 extended performance 5w30 and the M1 filter with 10k changes just becuase it's easy to remember. Amazingly this truck doesn't use a drop of oil in between 10k changes, it has 57k on it now and will be up for another change at 60k. I'm used to adding a little bit of oil ever few thousand miles in my LS6 (Corvette motor). Thoughts? Part of me says I should put the extended performance in both cars and do both once a year or every 10k. Part of me says I should go back to Amsoil in the Corvette but go w/ the 0w30 fancy stuff, but even w/ my preferred customer discount it's still mighty expensive these days. Thanks all.... BTW this forum drives me nuts! Every subject has 11,000,000 different answers!
 
Last edited:

Brian_Bowers

Thread starter
Joined
Jul 7, 2009
Messages
32
Location
Virginia Beach
Nothing will prevent all consumption in a LSX motor... my consumption is fine now... about 1/2 quart per 6-7k changes w/ hard use. Prior to the warranty re-ring in 2004 it would eat a quart every 1k miles. It's due to the piston rings and the PCV systems. One of the piston rings is changed out to the updated '02-'04 design and the PCV oil air seperator is replaced as it can come unsealed. That coupled with a catch can solves it all. It'll be interesting to see if I find more oil in the catch can now that I've gone back to 5w30 last weekend.
 

KW

Joined
Sep 4, 2003
Messages
1,686
Location
Central Arkansas
Amsoil ASL 5W30 in the toy hauler and Amsoil AMO 10W40 in the corvette. That's just my opinion. The same grades in Mobil 1 may work just as well.
 
Joined
Jun 22, 2008
Messages
282
Location
Central Valley, CA
Mobil 1 10w30 "high mileage" or German Castrol (Syntec 0w30) in both vehicles. 10k should be no problem for either oil. Both meet ACEA A3, are API SL (more zinc than SM). GC can be a good deal if found on sale, but the M1 10w30 HM is always a good deal at $22/5qt jug.
 
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