How long does oil last?

jmc,

You're not at Harold E. Holt, Exmouth, Western Australia by any chance are ya?

I was stationed there for two years, 1981 and 1982.

I loved that place! Diving, fishing and camping were the ticket! I had a Ford F150 there at the time. I put oil and filters in the cab so they'd be there when my truck arrived.

Only owned Dodge trucks since....:)

Cliff

Since oil don't wear out and only gets contaminated, some companies make a centrifuge that takes out all the contaminates. Google it. Many of the larger commercial trucks have them. I believe they also make a smaller version for autos/pickups. They aren't cheap, but may be better than changing you oil and filter all the time. By using one, you only need to replace any oil that was burned occasionally and clean the centrifuge.

Hank