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  #11  
Old 04-19-2012, 12:55 PM
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simplyconnected simplyconnected is offline
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I just got an email from Shell:
"Dave,

All of our Shell Rotella multigrade oils in the US contain
approximately 1200 ppm zinc.

Thank you for your interest in Shell Lubricants!

Regards,
Edward A. Calcote
Staff Chemist
Shell Lubricants US Technical Information Center
http://www.shell.us/lubricants"

Rotella-T is a gasoline OR diesel engine oil, as described all over Shell's web sites. 15W-40 is a heavy duty oil designed for cars, trucks, construction equipment, and marine. - Dave
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  #12  
Old 04-26-2012, 10:20 PM
Astrowing Astrowing is offline
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So, .12% zinc and no mention of phosphorus so it is still short According to the guidelines posted by KULTUSZ below probably due to reductions after 2001. With this logic, you still need to add a zinc supplement.
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  #13  
Old 04-27-2012, 02:09 AM
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Correct. The use of ROTELLA was a stop gap measure used a few years ago. Again, ROTELLA has been reformulated to meet new EPA standards and will continue to be reformulated.

Use of a modern gasoline engine oil with ZDDP additive is the best way out IMO.
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  #14  
Old 04-27-2012, 11:52 PM
Jimz Bird Jimz Bird is offline
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This is what I use.
http://www.penngrade1.com/Zinc.aspx

Interesting reading on the testing.

I located a dealer from their site. It was a motorcycle dealer. He didn't have it on hand but ordered it for me.

I bought a case and it worked out to 6.25 a quart. Don't know if the guy gave me a deal or not. He was a pretty cool old biker.

It is the OLD Kendall GT-1. The new Kendall is not the same. Somebody bought the name Kendall so they went to Brad Penn.
This is the original "Green Oil" Kendall GT1.
It has a unique smell. You love or hate it.

AND it is made in the USA of Pennsylvania crude.
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  #15  
Old 05-22-2012, 11:05 PM
Astrowing Astrowing is offline
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Just saw an ad in the June 2012 Vintage Truck magazine. Classic Car Motor Oil www.classiccarmotoroil.com has ZDDP already included at the correct levels. Manufactured exclusively for the Indiana Region of the Classic Car Club of America by D-A Lubricant Company Inc. Indianapolis, IN. Not an endorsement, just passing on the info.
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