Chevrolet 6.6 burning oil
Been a diehard Chevrolet gas, engine truck person my entire life. Use them very hard in my landscaping business, and the 6.0 gasoline never missed a beat. unfortunately the 6.0 gasoline is nonexistent...
Forum Discussion
Perhaps you have joined GMRRRD program not by your choice but theirs?
(General Motors Real World Research and Development)
When GM came out with the 3rd gen Vortec 5300 LM7 in 1999, which was in Silverado 1500s, Burbs and Yukons, etc, it was plagued with a cold start piston slap. Sounded like **** at cold startup, like it was getting ready to throw a rod. GM claimed it was "normal". By 2001 model year they had corrected it even though it was normal. I owned a 99 Silverado that had it and took it to over 280,000 on the ticker before I sold it, but it always had that cold start knock and it was about as annoying as possible but to me a new engine sounding like its going to puke a rod is not normal LOL.
The point is with a new engine like the 6.6 you are rolling the dice and GM is notorius for claiming things are "normal" as are all the manufacturers. Using a quart of oil in 1000 miles is in no way normal IMO, especially on a $60K+ truck LOL.
Perhaps that's one of the reasons why I see a lot of 2020/21 ultra low mileage 6.6 L8T trucks on the dealer lots around here.
(General Motors Real World Research and Development)
When GM came out with the 3rd gen Vortec 5300 LM7 in 1999, which was in Silverado 1500s, Burbs and Yukons, etc, it was plagued with a cold start piston slap. Sounded like **** at cold startup, like it was getting ready to throw a rod. GM claimed it was "normal". By 2001 model year they had corrected it even though it was normal. I owned a 99 Silverado that had it and took it to over 280,000 on the ticker before I sold it, but it always had that cold start knock and it was about as annoying as possible but to me a new engine sounding like its going to puke a rod is not normal LOL.
The point is with a new engine like the 6.6 you are rolling the dice and GM is notorius for claiming things are "normal" as are all the manufacturers. Using a quart of oil in 1000 miles is in no way normal IMO, especially on a $60K+ truck LOL.
Perhaps that's one of the reasons why I see a lot of 2020/21 ultra low mileage 6.6 L8T trucks on the dealer lots around here.
