I have a 2002 2500HD 4x4 with the 8.1 liter/496 ci. motor and allison transmission. apparently most of the first years this motor was in the truck as far as i know, the motor burns 1 quart of oil every 1000 miles or every 100 gallons of gas. chevy knows about it and has yet to do something about it. There is also an informational bulliten from GM but the dealer has to call it in to get the full details, here is the number and description of the bulliten, you will need it if you are going to talk to the dealer, they WILL NOT offer up this info, and might not even know about it.

#A001705C 8.1L L18 ENGINE POOR OIL ECONOMY - 8.1 CONSUMPTION DIAGNOSIS GUIDE HIGH HOT INTERNAL LEAK LEVEL LOW MISFIRE NOISE PLUG RING SEAL A001705C SUPERSEDES A001705A A001705

#A001705C 8.1L L18 ENGINE POOR OIL ECONOMY - 8.1 CONSUMPTION DIAGNOSIS GUIDE HIGH HOT INTERNAL LEAK LEVEL LOW MISFIRE NOISE PLUG RING SEAL A001705C SUPERSEDES A001705A A001705

i also used to have a 2001 Z06 that did the same thing, though another guy with the same car and the same problem had the motor rebuilt and never burned oil again.

i have many friends that own mechanic shops and none of them know the correct "fix" to the problem.

any suggestions??

 

I have an 04 8.1 and friends have an 03 and an 04 8.1 that use alot of oil. Been to the dealers multiple times with no resolve.

 

Big Chevy, do you have pictures of your truck? I'm sorry to hear that you are having issues with burning alot of oil. Ever since 2002 I've always wanted an 02 with the 8.1 and allison 4x4. I know you said you know alot of people with shops, but have you been to JBA?

 

yeah, ill try and get some up soon. thanks all for helping out.

 

Here are those pics you asked for, many more to follow.

 

Thanks for putting them on there. That is a really nice looking truck!

 

thanks, it looks bigger and better in person.

 

I can imagine, dare I ask what kind of gas mileage you are getting with that beast??

 

I had an 8.1 in a 2001 HD, it used alot of oil when loaded, but light it was pretty easy on oil consumption. I had heard of the problems but never really heard of a real fix. Keep us posted about it.

 

yeah, i get anywhere from 8-10 MPG on a good day with the wind pushin me. haha. its a good thing its my weekend warrior or i would be broke just puting gas in in. i put about $60 in it every 4 days.