jeffz0rz

Gray in color, only at WOT or first thing in the morning. A little over 2 quarts per oil change. Yikes.

03sierraslt

iTrader: (22)

Personally I would avoid additives like that as in many cases they have been proven to cause oil aeration.

GMCtrk

iTrader: (27)

Valve seals are probably shot

MasonB

Yea one of my valves sticks sometimes and will smoke when I start it but it's not every time

trxmxzx

iTrader: (7)

Damn thanks for the heads up on that

MasonB

Gray can also mean it's burning trans fluid from what I've read

batboy

iTrader: (6)

Check for leaks and do a compression test.

jeffz0rz

No leaks, and will do a compression test asap.

Okie5.3

iTrader: (1)

Is this a AFM (displacement on demand) truck? The AFM trucks have had issues with oil consumption, more so than non-AFM trucks. If it is AFM the consumption could be from blow-by past the rings. The pistons tend to get extreme amounts of carbon build up causing the rings to stick resulting lots of blow by. This could be enhanced by the oil squirter as well. The AFM lifters have also contributed to the oil consumption issue. The PCV orfice could have an issue causing oil to be pulled into the intake. There is an updated valve cover to supposedly solve this. Pull the throttle body and check for oil in the intake. If there is more than a light film of oil in the intake, I would start with the easy fixes first, such as pulling the lsft valve cover and checking the orfice and surrounding area for any signs where oil could be pulled through into the intake.

TLoke13

Is smoke on acceleration or decel? Or always? And cylinder mis firing?