0w20?
Tech Contributor
Joined: May 2008
Posts: 2,843
Likes: 16
From: Howell Michigan
St. Jude Donor '09-'10-'11
The 0W20 is designed to go with some of the newer engines that have been tested to use it. Your LS1 hasn't.
Team Owner
Joined: May 2001
Posts: 87,338
Likes: 1,591
From: Western NY
I use 0W-20 in my C-5 during the winter......while it's in storage! I like to start the car 2-3 times during the winter to circulate the oil and lube up the seals, etc, , run the A/C in defrost mode for the same reason, and keep the valve springs from sitting in one position for too long. I put the "light" oil in it so it will start circulating faster.
Burning Brakes
Joined: May 2011
Posts: 1,216
Likes: 56
From: Houston Texas
Make that X6 
All of the bearings in your engine require a particular film thickness of lubricant. GM put 5W30, even on the filler cap, for a reason. Unless you feel like using your engine as a test bed for a thinner oil at like temperatures, I would stick with the recommended.
Keep your foot off the floor if you are concerned with fuel mileage...
All of the bearings in your engine require a particular film thickness of lubricant. GM put 5W30, even on the filler cap, for a reason. Unless you feel like using your engine as a test bed for a thinner oil at like temperatures, I would stick with the recommended.
Keep your foot off the floor if you are concerned with fuel mileage...
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Joined: Dec 2009
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From: Columbia South Carolina
Le Mans Master
Joined: Sep 2003
Posts: 8,847
Likes: 795
From: Longview Texas
I noticed some of the new Toyota's come with 0W20, but I have a hard time using zero OR 20 weight oil, even in engines that are supposed to be designed for it, in Texas. I changed the oil in my daughter's 4Runner and used 0w30, but I would not use it in an older engine.
I use 10W30 Valvoline Synpower in my Z06.
I use 10W30 Valvoline Synpower in my Z06.
