. <<They way far exceed anything that the engines of the 80s were
designed for. Far more stabilizers for low and higher temperature
ranges. For more additives for both stickiness and slip. If your using a
quality oil on those engines you could easily get away with that
schedule>>

I agree on the superior oil technology.

However, with only a 5 quart oil capacity
I sure wouldn't want the acid and sulphur by products of internal
combustion laying inside my engine.

A class 8 truck has a 15 gallon oil capacity, and the recommended oil
change intervals are at 10,000 miles.

You suggest that with a 5 quart capacity leaving that garbage inside the
crankcase?

Thank you--not me.

Oil changes are the cheapest and most redeeming maintenance anyone could
possibly perform on their vehicle.

I'll stick to the 2500--3000 mile interval's.
It has proved rewarding may times over.

I have never had any lifter, stuck ring, or bearing problems, and always
get big trouble free miles out of my engines.

10,000 mile oil change intervals---

Oh Yea.