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Re: GL-1 Question

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Jason S.

09-28-2013 07:41:53

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It isn"t just zinc that"s added to the oil. It also contains phosphorus. ZDDP was added to oil to help lube flat tappet cams and lifters and to prevent corrosion on lead/copper bearings. I can"t see any benefit to adding it to your GL1.

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09-29-2013 10:20:59

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 Re: GL-1 Question in reply to Jason S., 09-28-2013 07:41:53  
Thanks Jason,

I will not add the zinc supplement to my tractor hyd trans sump.

Rather than take it back is there anything else motor or trans wise that would benefit from a dose of zinc?

Lawnmower engines, bush hog gearbox, old jeep transmission, etc.

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Jason S.

09-30-2013 09:42:22

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 Re: GL-1 Question in reply to maxwell99, 09-29-2013 10:20:59  
Any older engine that has a flat tappet camshaft would benefit from a zinc and phosphorus or ZDDP additive, especially if you are running conventional oil in it instead of diesel oil. Most new camshaft manufacturers will not give you a warranty on new flat tappet camshafts unless you have proof of adding ZDDP additive to your oil during break in. So there's the proof that older engines need it and benefit from it.

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