Originally Posted By: LemanJoe
Ok. I need to reply to some.
I am not ready (mentally) and do not have any time to argue with anybody's believes about engineering and oil viscosity effects. Yes, there are many cars running on 5w20 and lasting longer than 100k miles. There are at least a few billions people living on bread/water and doing "fine." There are a few millions of people doing "fine" living without clean drinking water and a bunch of people are "fine" using their left palm wiping their butts. And a bunch of Americans eating Donald's and they are "fine."
I am sorry if I hurt somebody. You guys are great and your cars run forever on any oil, as long as somebody at API decided on the formula. I get it. Have a nice day!
Actually Mercedes offers extended warranties up to 125k and if you buy CPO, they offer an unlimited mileage warranty, but it's only one year. The belief that cars only last 100k is probably also from the era where you changed oil every 3k. Those days are gone. It's just that most people like you haven't gotten the message. You may also be confusing a couple things, they may be designed to last 100k but in reality last a lot longer. That's not the same as designed to fail at 100k. For instance, you have to design an engine that will function in extreme cold climates and then you also have to make sure it works in hot climates, same engine. In milder climates, it may last much longer on average, but you still have to design for the extremes.
You should look at the SSD torture test, some of them lasted 30-50 times longer than the life they were rated for.