Fw: Zinc Content in Citgo oil
Dan
-----Forwarded Message-----
>From: Dan <io...@earthlink.net>
>Sent: Aug 28, 2009 12:35 PM
>To: Lubes Answer Line <lube...@citgo.com>
>Cc: Larry Swanson <Stud...@aol.com>, Graham Gagne <kg.w...@ns.sympatico.ca>
>Subject: Zinc Content in Citgo oil
>
>I use multigrades exclusively. 10W-30. Will check with my oil supplier (RWE Distributing in Farmingdale, NY) and ask him to obtain the Citguard 600 10W-30 quarts oil for my next service on my Studebakers.
>
>You have answered my question. With your permission, I shall forward your response to a couple of my Studebaker friends. You may want to have your company put on an extra oil refinery shift from all the new business you will get...
>
>Thanks again for your prompt response. You are a great help.
>
>You and Hugo Chavez have done more for me than Exxon-Mobil.
>
>D. Dobbins
>
>>Mr. Dobbins,
>>
>>The API SM Service Category requirements include limitations on the
>>phosphorus content (0.08 m% maximum) of engine oils designed for 2004
>>and newer automobile gasoline engines. Lowering the phosphorus content
>>also lowers the zinc content therefore lowering the antiwear protection
>>slightly. Modern engines are designed to operate with lower antiwear
>>protection. However, older engines with flat tappets and softer cam and
>>tappet material require a higher level of wear protection.
>>
>>For engines in older cars, collectables and antiques like your
>>Studebakers, we recommend that our CITGARD 600 SAE 10W-30 grade engine
>>oil be used. If a single viscosity grade oil is desired, CITGARD 600 is
>>also available in SAE 10W, 30, 40 and 50 grades. Heavy-duty diesel
>>engines oils, such as CITGARD 600, which meet the API CJ-4 Category
>>requirements, contain a higher level of zinc dialkyldithiophosphate
>>(0.12M% phosphorus maximum) for the wear protection necessary to pass
>>the Cummins ISB engine test. Passing this engine test assures more than
>>adequate wear protection to protect older cam and tappets.
>>
>>Bob Teasley
>>CITGO Lubes Answer Line
>>800-248-4684
>>
>>-----Original Message-----
>>From: Dan [mailto:io...@earthlink.net]
>>Sent: Thursday, August 27, 2009 7:20 AM
>>To: Lubes Answer Line
>>Subject: Zinc Content
>>
>>
>>
>>Gentlemen,
>>
>>I need your expertise in answering a technical question.
>>
>>Recently, a discussion has arisen concerning the zinc content in engine
>>oils and its affect on older engines.
>>
>>I use your Citgo Supergard 10W-30 (an API rating of SL) in my three
>>Studebaker engines. On the three vehicles, we probably log in a bit
>>over 20,000 miles per year. They are regularly used, high mileage
>>vehicles.
>>
>>It is my understanding that the zinc formulation changed after the SH
>>ratings. Will the later rated motor oils affect the lifters and cam
>>shaft lobes in my three Studebakers?
>>
>>Dan Dobbins
>>Medford, NY 11763
>>eMail: io...@earthlink.net
Mike Space
Mike
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Brian Hunter
Greetings from' The Great White North' ;
For the performance-minded individuals out there, Brad-Penn Grade 1 (formerly Kendall GT-1) is about the best high zinc/phosphorus oil available; we use it exclusively in our race Volvos as well as any performance application where camshaft (flat tappet design) wear is an issue. GM also produces an oil suppliment- EOS - I believe sold under part # 1052367 at around $9 per 16oz bottle, if a high zinc oil is unavailable.
If synthetic is your deal, Amzoil (spare no expense) Red Racing oil is a very good oil for post break-in applications.
For the Studes/Volvos and any others living in an unleaded fuel world we also use a lead substitute in the fuel tank to protect the non-hardened exhaust valve seats in our street cars until rebuild time when hardened seats can be installed. NAPA or just about any other big parts supplier sells this product.
Cheers for now,
Brian
Old Volvos Rule!!!
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