Oil Consumption

asilverblazer · June 16

21 hours ago, PunchT37 said:

1/2 qt over full ain`t gonna hurt $h!t. Most times, a whole qt won`t either. Most have windage trays now. As long as the crank isn`t slapping itself in the oil, it`s not the end of the world.

I agree.

However, the owner's manual, suggests that a drop over full is just as bad as a drop under. (Read black and white letters only, insert no common sense.)

PunchT37 · June 16

10 minutes ago, asilverblazer said:

I agree.

However, the owner's manual, suggests that a drop over full is just as bad as a drop under. (Read black and white letters only, insert no common sense.)

Oh please. Wonder what temp they measured the drop over?

Not bustin your ball$.

riddler · Saturday at 04:01 AM

Thanks everyone for your input on this subject. It was very entertaining but not educational. Bottom line. The GM 6.6L should not consume oil, which it does, no matter the driving style. Only time will tell if it lasts past 100k. I am hoping 200k+.

GM needs to get back to the piston rings and top fuel injection which works and has been proven.

You may now move about the cabin.

c4racer2 · 2026-06-23T14:05:03Z

On 6/19/2026 at 10:01 PM, riddler said:

Thanks everyone for your input on this subject. It was very entertaining but not educational. Bottom line. The GM 6.6L should not consume oil, which it does, no matter the driving style. Only time will tell if it lasts past 100k. I am hoping 200k+.

GM needs to get back to the piston rings and top fuel injection which works and has been proven.

You may now move about the cabin.

I think the ship has sailed on the fuel injection type - everything is getting direct now. Does it help with mpg? Not really and nobody buying a HD truck really cares anyway. But that is what it is at this point. Piston rings is something they may well adjust over time to get them right.