While I believe half the problems people have are caused by them, lousy engineering makes up the other half, and trying to milk the last mile out of an oil change makes up the smallest part. People being impatient. starting an ice cold motor and flooring it before the motor has spun 1,000 rpms, might just hasten the failure process. I've also noticed alot of cars for sale with transmission failures. Seems they always take the car to the car wash, but never even think about having the transmission fluid changed. And if you ask someone about changing it, they'll look at you funny and say something like, I don't think it needs to be done on my car. Kinda like when you ask someone ,when was the last time you changed the oil in your lawnmower. Again driving your car like your in a Nascar race, all the time will cause expensive parts to quit before there time. You can use the best brand of oil know to man, but if you let it run low, or never change it, it will do it's job until it's given your motor all it can. And no one will take the blame for ruining the motor, so it must be the oil.,,,