Zinc (ZDDP )was killing catalytic converters in gasoline vehicles, so they reduced it drastically in oils rated SM and up. The change caused much damage to vintage auto racer's performance camshafts. I worked in the vintage Lotus racing business when they changed over, and we sold a lot of parts. It does the same to "normal" engines slower. Diesels dont have cats, so they didnt change their formulation much. I run diesel rated Delo or Rotella in all my pre-cat gas engines, and i have a lot of them
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Today's Featured Article - Oliver 550 Clutch Overhaul Tips - by Greg Sheppard. I got my 1964 Oliver Model 550 (serial 141-139-519) second-hand and used it for several years before the clutch began to slip. After taking up the pedal linkage several times I saw it was going to take more than that. The engine had been leaking oil at the rear seal and I suspected
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For sale Farmall super A tractor is complete and has just been setting for awhile,it was running when pulled out of the barn,shouldn’t take to much to get it going asking 1100.00
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