Different types of motor oil ?

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Originally Posted by Biggd

I'll bet you've never built or tore apart an engine. Engines today will run a long time on dirty oil but the next owner will pay for the frugalness of the previous owner. But I will admit, most don't care about the next owner.

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Yeah, I’d do anything on a car when I was kid.
But I moved on from 100’s of bolts to millions of transistors.

In the 70’s and 80’s you were lucky to reach a 100K miles.
Assuming it didn’t rot out before then. Changing oil every 3K.
Today it’s pretty routine to reach 200-300K. Without rot. With 10K intervals.
Problem is, other systems in the car need work and are not worth fixing.
Old Electrical, suspension, AWD systems can get expensive on repairs.

All my cars were in top running condition when I sold them.
Some with over 230K.