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Old Sep 26, 2011 | 09:53 PM
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winter oil
what are you guys running for oil in your 300 in the winter months?
 
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Old Sep 26, 2011 | 11:41 PM
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5w30...any SAE/API certified oil will do.
 
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Old Sep 27, 2011 | 01:37 PM
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10w30 semi syn
 
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Old Sep 28, 2011 | 11:53 PM
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Need to run an oil with lots of zinc (like diesel oils) or add a bottle of zinc additive.
 
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Old Sep 29, 2011 | 01:09 AM
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Originally Posted by 4x4 Bart
Need to run an oil with lots of zinc (like diesel oils) or add a bottle of zinc additive.
Rotella has zinc additives, which btw, is what I'm swapping to....From Castrol GTX...

Nothin wrong with Castrol, my engine is getting near 200k...(179k as is)...
and I figure it needs more love...
 
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Old Sep 29, 2011 | 05:19 AM
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What is the zinc for?
 
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Old Sep 29, 2011 | 10:33 AM
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Oil & Lubrication - Ford Truck Enthusiasts Forums

The oil wars are conducted on that Forum. Enjoy.
 
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Old Sep 29, 2011 | 03:44 PM
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Flat tappet lifters (which our engines have) can have loads up to 40,000psi when revving. Zinc prevents this extreme load from being metal to metal and causing excessive cam wear.
Zinc was taken out of automotive motor oil because it was found to damage catalytic converters over long periods of time.
Diesel, racing, and most high end synthetics provide protection for flat tappet engines.
 
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Old Sep 29, 2011 | 05:34 PM
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The following Mobil Oil page has a link to an Excel spreadsheet that may be worth taking a look at....

Has Zinc Been Removed from Motor Oils?
 
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Old Sep 29, 2011 | 08:05 PM
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Originally Posted by ctubutis
The following Mobil Oil page has a link to an Excel spreadsheet that may be worth taking a look at....

Has Zinc Been Removed from Motor Oils?
Great link ctubutis, I learned a lot. Would rep you but I can't.
 
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Old Sep 29, 2011 | 08:09 PM
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