Re: Oil change frequency?
One a year is fine and we don't need synthetics at that rate. ( I run the semi-Synth Penn Grade only due to heavy valve springs ).
Once exposed to air and circulated, oil will continue to degenerate, so leaving it a crankcase for long periods of time isnt kosher. Ask any REAL chemical engineer.
Ralph, if you drop the oil in the fall, when putting the car up, why bother refilling at all, wait until spring? Or do what I do, drop it in the spring, so there is no priming issue.
PS, I dont even let my GEAR OIL last for 4-5 years kids. Nor the brake fluid.
Greg, as I used to run oem alum heads ( 074s) , I always kept RED coolant in the mix for its anti-oxidation qualities. It never went to 100% water. But then again, I dont store it at -40!
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