I just got a 02 Z28 M6 with 45,000K on it and well when i bought it i checked the oil and it was good, as in clean and full well three months have gone by and also about 3000 miles so I checked the oil for the heck of it and it is 2 qourts low and is Very Very black.

What do you guys think????

 

it's an issue with the PVC system if i remember correctly. not all that uncommon.

do some searches for the LS6 pvc upgrade.

 

Dont you meen PCV????

 

Dont you meen PCV????

 

oh ...yeah...sorry

morning

 

Dont you meen (mean)?

 

Ha we all cant spell! thanks guys

 

Just having a little laugh,no insult intended.Have a great weekend!

 

Hay I looked it up and it seems like its normal for the LS1's to burn oil, did Chevy do a recall for this problem, and if not dont you think thay should have i maen this is kind of a big problem to have for a car that is a 2002, now to help this problem it is a big job and that doesnt evean fix it, do any of you guys have this same issue???

 

It's not normal, many of us have engines that use little oil. GM looked into it and found one factor in high oil usage on M6 Corvettes was driving at higher rpms at light load. Apparantly it allows the rings to float. GM recommended loading the engine to prevent this. They went with higher tension rings in later engines.

I put it in higher gears as quickly as I can when just cruising. I also stay away from M1 30 weight synthetics. They are on the thin end of the 30 weight scale and get thinner in use. Currently using M1 5-40 T&SUV. Just checked the level @ 1,000 miles on the change, no noticeable drop in level.

If the 2 suggestions above don't help, might want to do a compression check.

 

I posted about this in the other thread that was about problems with '98 Z28's or something. I go through a quart and a half or two between oil changes (every 3K). GM has a TSB (kind of like a recall) about this. The General's solution is to either drive less aggressively or replace the oil sealing rings on all the pistons. Some people got the rings done under warranty but if you're out of warranty then, uh, keep the rpm's down.

There is a different problem with the M6 Corvettes that involves the PCV valley cover or something. I had this TSB printed up before but I can't find it. I'll print it again at work today if I can remember.

Abe

 

Like Teke said check the simple things first.

Change the pvc valve. When they go bad they suck the oil right out of the pan by the quarts full.

 

Theres a good write up on this topic here. Thery recommend the LS6 PCV system.

http://www.ls1howto.com/index.php?article=18

 

I had one oil change where I had what seemed to be exceptionally high oil consumption (the low loil light came on at about 2500 miles into the change)
It was when the car had about 10,000 miles on it. Since then i have always tossed in an extra half a quart of synth into my car upon changes and have never had an issue. In fact, i measured the amount coming out, and 6+ goes in, 5+ comes out 3000 hard miles later. I think my one change I must have been math-tarded and missed a quart. I would monitor future changes. Of course if the engine is noticibly burning oil, then its a different case.

 

If it makes you guys feel any better, Mercedes Benz spec for oil consumption is a max of 1 qt per 1000 miles.