Posted by Gambles on February 12, 2018 at 07:39:30 from (24.246.193.220):
In Reply to: Zinc Additives posted by Traditional Farmer on February 12, 2018 at 03:57:58:
Not to pick on any single poster here, just thought I'd add my $.02 and have a few other posters pick it apart... The good camshaft and lifter saving additives have been taken out of a lot oil to help save the catalytic converters that so many vehicles have. AS I SEE IT (and I wear glasses, so my eyesight is not perfect), an older tractor that has put in 100s if not 1000s of hours probably doesn't need any zinc additives other than what is already in most diesel engine oil. (Side note: many diesel engine oils have dropped a lot of zinc content. Better check how much your oil has in it) New cars that have roller lifters really don't need the zinc, but of course our older tractors don't have roller lifters. The zinc additive really is needed for older flat tappet car engines that have super-fact camshaft ramp speeds or engines that can easily rev to 6 grand. So...if you have an older tractor that has a broke-in engine, don't worry too much about it, provided you use a good diesel oil or an oil that has your zinc in it. If you have a rebuilt engine with new lifters or/and camshaft, have some concerns. If you have a new engine that has been rebuilt by somebody else, ask what oil and additives they recommend and exactly how they want it broke in. The problem really rears it's head when the camshaft manufacturers buy blanks from China, finish the milling in the states and the heat treating is scarce or the blanks were cast with poor materials.
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