WXman
Ram Guru
I’ve been hearing for a long time now that the modern crop of V8 gas engines from GM are notorious for consuming large amounts of engine oil. Then I saw some videos on the 2.7LT I-4 HO gas engine going into the 2023 Colorado and allegedly there are some oil consumption issues with it also. And then last night I stumbled upon a video discussing the rampant issues with oil consumption on the new LZ0 Duramax 3.0L diesel engines. It seems like everything GM makes these days drinks oil as fast as fuel.
As far as why…it seems that they are using low tension piston rings to try and reduce friction and squeeze out another 0.2% more fuel economy on EPA testing. These low tension rings can’t effectively scrape oil off the cylinder walls, and so more oil is escaping into the combustion cycle.
One thing that really bothers me is when I have to carry oil with me so that I can top off every time I fuel up. I’m grateful that my 5.7L Hemi doesn’t have this issue. My 5.0L Coyote in the Mustang doesn’t seem to either. The news of these issues on GM engines is yet another reason I would never buy one (though I swore years ago there’d never be another GM product in my driveway ever again because they are junk). My goodness…these EPA regulations are killing reliability of vehicles.
As far as why…it seems that they are using low tension piston rings to try and reduce friction and squeeze out another 0.2% more fuel economy on EPA testing. These low tension rings can’t effectively scrape oil off the cylinder walls, and so more oil is escaping into the combustion cycle.
One thing that really bothers me is when I have to carry oil with me so that I can top off every time I fuel up. I’m grateful that my 5.7L Hemi doesn’t have this issue. My 5.0L Coyote in the Mustang doesn’t seem to either. The news of these issues on GM engines is yet another reason I would never buy one (though I swore years ago there’d never be another GM product in my driveway ever again because they are junk). My goodness…these EPA regulations are killing reliability of vehicles.