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I wanted to let you guys know about a conversation I had with a tech at Royal Purple synthetics. This is not a thread to discuss to use or not to use, but a thread to let you know that they have an oil that meets/exceeds the old flat tappet wear additive requirements. I asked him two questions, one about the boat, and the other about my wifes jeep commander. I have been running Royal Purple in my diesel truck for years and love it. Here is his response to me asking about their oil having ZDDP in it.
Brad,
The RP SAE Motor Oils have not had any of the ZDDP packages reduced like many other oils. We are continuing to make the robust antiwear package.
The oils that are affected are oils that you would not typically run in your engine - those being the API SM rated oils in a 0W20, 5W20, 0W30, 5W30 or 10W30 grades. These grades are capped at 800 ppm of ZDDP.
The RP 5W20 and RP 5W30 and RP 10W30 are still made to the more robust API SL and contain 1100 ppm of ZDDP - the same as the reduced diesel rated API CJ-4 oils.
The oils that I would recommend for your Ski Nautique are the RP 10W40 or RP 15W40, which are still made to the more robust API CI-4+ / SL ratings meaning they have 1350 ppm of ZDDP.
Be careful of assuming that wear is a linear direct relationship - not all packages are created equal - it would be like buying beer or wine based solely on alcohol content!
For the ultimate - use our RP XPR 10W40 which has over 1500-1600 ppm of ZDDP.
The kicker is - we could take all of the ZDDP out of our engine oils and still have 4 times the wear resistance of even the VR-1 oil due to our Synerlec additive technology.
The M1 reference to Chrysler is a 'factory fill spec. Since RP does not go after price sensitive factory fills - pursuing higher performing oils, we have not applied with Chrysler for factory fill certification.
The RP 5W20, being an API SL has 30% more antiwear than the M1 5W20 API SM rated oils.
Cheers,
David
David Canitz
Tech Services
Royal Purple Inc.
1 Royal Purple lane
Porter, TX 77365
281.354.8600
713.725.7207 cell
dcanitz@royalpurple.com
Brad,
The RP SAE Motor Oils have not had any of the ZDDP packages reduced like many other oils. We are continuing to make the robust antiwear package.
The oils that are affected are oils that you would not typically run in your engine - those being the API SM rated oils in a 0W20, 5W20, 0W30, 5W30 or 10W30 grades. These grades are capped at 800 ppm of ZDDP.
The RP 5W20 and RP 5W30 and RP 10W30 are still made to the more robust API SL and contain 1100 ppm of ZDDP - the same as the reduced diesel rated API CJ-4 oils.
The oils that I would recommend for your Ski Nautique are the RP 10W40 or RP 15W40, which are still made to the more robust API CI-4+ / SL ratings meaning they have 1350 ppm of ZDDP.
Be careful of assuming that wear is a linear direct relationship - not all packages are created equal - it would be like buying beer or wine based solely on alcohol content!
For the ultimate - use our RP XPR 10W40 which has over 1500-1600 ppm of ZDDP.
The kicker is - we could take all of the ZDDP out of our engine oils and still have 4 times the wear resistance of even the VR-1 oil due to our Synerlec additive technology.
The M1 reference to Chrysler is a 'factory fill spec. Since RP does not go after price sensitive factory fills - pursuing higher performing oils, we have not applied with Chrysler for factory fill certification.
The RP 5W20, being an API SL has 30% more antiwear than the M1 5W20 API SM rated oils.
Cheers,
David
David Canitz
Tech Services
Royal Purple Inc.
1 Royal Purple lane
Porter, TX 77365
281.354.8600
713.725.7207 cell
dcanitz@royalpurple.com
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