I know this was discussed in the past so I wanted to get in touch with the source directly. I emailed Quaker State today, who must be owned by Shell because that is who the email went to, but I explained to them that I was using there product. I have used the Quaker State full synthetic 10W30 in both of my 455's for about 2 years now. Right away I noticed a difference in valvetrain noise being much quiter. I was really impressed with it and have continued to use it. After reading all the discussion about the zinc levels being reduced I wanted to find out if I was going to have any problems with using this product. Attached are the emails we have exchanged over the day and I was just wondering what you guys think of their reply, whether it has any validity or not. Also, what is everybody else running in their engines. Thanks for the help and I want to wish everybody a Merry Christmas.
Marty McLeod 69 Cutlass S Convertible 455 69 Vista Cruiser Dear Mr. McLeod; If the vehicle is going to see a great deal of driving or if it is going to be used for racing or other applications where the engine is going to experience high RPMs, an oil with a higher zinc and phosphorous content might be necessary. If the vehicle is used for leisurely weekend drives or cars shows then the additive package in the synthetic oil will be more than adequate to protect the engine. Product Techncial Service -----Original Message----- From: Marty McLeod [mailto:[EMAIL PROTECTED] Sent: Friday, December 22, 2006 1:43 PM To: PrdMktTechServices, SLUBE-OGML/1 Subject: Re: Full Synthetic Question Thanks for the help. Why does it make a difference if it is just a weekend driver or a everyday car. If you think I should consider changing it if it is a everyday driver then why would it be OK to use if it is only driven 2 times a week, maybe 3 at the most per week. Could you please explain. Those other oils that you mentioned, are they synthetics or just regular oil. Thanks again for the help. I want to make sure my cars run a long time without failure so I want to get the best product in there that you think suits my needs. Marty McLeod ----- Original Message ----- From: <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Friday, December 22, 2006 11:15 AM Subject: RE: Full Synthetic Question Hello Marty, Depending on what kind of driver the vehicle is used for will determine you need. If the vehicle is just a weekend toy then the Synthetic is fine. If the vehicle is a daily or almost daily driver or a street/strip car then you may consider changing oils. If you are seeking a higher zinc and phosphorous contents you may have to look to a racing oil. We have a product that is called Pennzoil Racing Motor Oil and is available in SAE 50, 60 and 25W-50. It has approximately 1800-2000 ppm of zinc additive for extra wear protection. Other engine oils with comparable anti wear protection would include Shell Rotella T 15W-40 and Pennzoil Long Life 15W-40. The zinc and phosphorous levels were recently reduced (from the API SL levels) as there has been concern that the oil that makes its way in to the combustion zone of your engine, carrying these anti-wear metals was burning and poisoning the catalyst in the catalytic converters. Should you desire to speak with a technical representative to discuss this issue in more detail please call Pennzoil-Quaker State Technical Information at 1-800-458-4998. Sincerely Product Technical Service -- No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.5.432 / Virus Database: 268.15.26/594 - Release Date: 12/20/06 3:54 PM
