A friend of my brother's, who was corporate pilot for PPG (he flew Gulfstream#1 and Gulfstream #2) was a stickler for air craft maintenance, NEVER CHANGED OIL IN HIS CAR. His philosophy was oil never wears out, it just gets dirty. His fix was to change the oil filter in the car, a 401 Buick engine, ever other year, add a quart of oil.....and went down the road......until the engine started making clicking noises.....like a collapsed valve lifter. Pulling the valve covers reveled......you could not see any valve train parts at all....springs, rocker arms etc......like unmolding a jello salad.....except everything was encased in blackish sludge......it was remarkable that the engine ran at all........moral of the story......use a good oil (owners choice) and change it and the filter every 3-4 thousand miles or more often.....just my opinion of course........
BOB RENTON
