When I test drove the Sierra with the 6.2, I really liked it but that 6.2 made me nervous.

 

Yeah thats what his research is telling him too

Just under 36k miles

 

Yeah, this can't just be blamed on thin oil. Not at 36k

 

Nope! Clearly a design or manufacturing issue

 

1) What aspect of GM quality management inspires you to this level of confidence that the workers are the problem?

2) And why are American workers able to assemble high-quality powertrains and vehicles—that is, when they're guided by Japanese management teams who didn't get their training at US business schools and aren't bidden to respond to US short-term stock market profit pressures?

Okay, that answers my second question — even if in a way that reflects quite a negative view of humanity, and contradicts well-proven psychological principles that people respond better behaviorally long-term to positive reinforcement than to threats and punishments.

It doesn't address my first question at all. What aspect of GM's record gives you confidence that this is not a failure of design, engineering or managerial thoroughness? GM history is riddled with them. As someone with over 7,000 posts on an auto enthusiasm board, you have to know that.

 

So chevy forgot to build a small block v8 and toyota forgot how to build a force inducted v6.

So the most reliable trucks are from the guys and gals at auburn hills and dearborn?

 

If "reliable" is defined in part as "reliably backed by its maker," I can't see those other two stepping up to do full replacements of 102,000 engines because a minority of them have a problem, as Toyota is. I have a lot more confidence in that organization to make its owners whole, then find and fix its problems.

 

Pretty valid points, especially the way you put it.

Is my Yukon going to grenade?

They'd best be giving people fresh powertrain warranties with new engines, is that a thing?

 

Off road fun today. People who buy off road trucks and make them look tough but don’t ever go off road, shame on you. Today I actually had to use low range because I need new tires.. You ain’t an LX driver until you go destroy mud and gravel on bad street tires…

 

It can be, run 10 weight of low specs in an engine designed for a high grade 30 hard for a few thousand miles and it will have noticeable damage. The oil would be fine if tit didn't get contaminated with bad fuel on top of the engine being aggressively tuned

 

Well, I'm no expert, so I'll take your word for it 👍

 

whats a 10 weight and high grade 30?

 

He means like a 10w30

 

Engine parts can fail in minutes without proper lubrication, oh yeah. 🖖

 

An engine can fail if one runs an oil not upto requirements like say running 0w8 in a motor designed for 10w60, if one decides to forgo using Porsche c40 rated oil for indy special api rated oil, or who run 15w40 in climates below -35C.

However running a 10w30 at the correct ambient temps in a gm 6.2, wont cause any harm, actually would be beneficial. That being said, even the best spec oil cannot overcome poor design or material inadequacy.