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Re: Zinc oil additive [Re: CompSyn] #60902
06/27/08 08:58 AM
06/27/08 08:58 AM
Joined: Mar 2006
Posts: 198
Maryland
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mrob Offline
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mrob  Offline
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Joined: Mar 2006
Posts: 198
Maryland
Comp,
The general consensus seems to be that flat tappet engines need at least 1200 ppm of zinc dithiophosphate (aka zinc). It's hard to find such an oil in a normal retail parts store, but these should still be ok:
1) Chevron Delo 400le (non-synthetic), 15W-40, CJ-4 API rating, 1230 ppm zinc.
2) Valvoline Premium Blue (non-synthetic), 15W-40, CJ-4 API rating, 1291 ppm zinc.
I sure there are some synthetics with more than 1200 ppm of zinc and hopefully, someone else will chime in.
Hope this helps.

Re: Zinc oil additive [Re: mrob] #60903
06/27/08 09:50 AM
06/27/08 09:50 AM
Joined: Jan 2003
Posts: 5,186
Wherever I am.
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Junky Offline
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Wherever I am.
Quote:

Comp,
The general consensus seems to be that flat tappet engines need at least 1200 ppm of zinc dithiophosphate (aka zinc). It's hard to find such an oil in a normal retail parts store, but these should still be ok:
1) Chevron Delo 400le (non-synthetic), 15W-40, CJ-4 API rating, 1230 ppm zinc.
2) Valvoline Premium Blue (non-synthetic), 15W-40, CJ-4 API rating, 1291 ppm zinc.
I sure there are some synthetics with more than 1200 ppm of zinc and hopefully, someone else will chime in.
Hope this helps.



Shell Rotella T 5W40 synthetic is 1300+ ppm zinc. $17 per gal.

Mobil 1 15W50 synthetic is 1300+ ppm zinc. $22 per 5 qt jug.


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