For the work truck why bother? Keep records of what you pay as an overhead cost & deduct it from your taxes.
Then you can go sit in a waiting room where it is not raining, get rid of the old oil & use regular time off for something you really want to do rather than changing oil, filters, tires, brakes, spark plugs, light bulbs. How much is your time worth?
The synthetic oils work pretty good...your choice...but do not mix them with petroleum based lubes.
Joe
Re: pure synthetic oil
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