rp zinc
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Joined: Jul 2006
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From: coastal nc
09 c63 10 c300 Nissan truck
rp zinc
Anyone know the zddp prm in royal purple 5w40 ? I recently put 5w30 rp in my nissan truck and it runs cooler and smoother Is 5w40 rp strickly a sm oil or is it sm/sl combo?
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Joined: Feb 2004
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From: South Orange County, CA
4 wheels
I would only use Mobil 1 5W-40 in regular MBZ engines, and only Mobil 1 0W-40 in AMG engines. I don't care for other companies much really, as Mobil 1 is factory fill for all high performance manufcaturers. Hell, even cheapo Acura has Mobil 1 as factory fill.
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Joined: Sep 2006
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2003 E320
"In recent years, auto manufacturers have switched to roller camshafts for performance and fuel economy reasons. This combined with the EPA requirements for reduced emissions, has led to the reduction of zinc diakyl dithiophosphate (ZDDP). This lower zinc content will not properly lubricate the flat tappet hydraulic lifters we use on the majority of our engines. Comp Cams has come out with a recent study indicating oils designed for diesel engines still have the higher zinc content. These oils have a service rating of CI4 and are of a 15W40 weight.
Our independent testing agrees with Comp Cams findings. Therefore, we are recommending either the use of SHELL ROTELLA oil with a 15w40 weight during the initial start up and during the break in period of your Blueprint engine. If you wish to use another brand of 15w40 oil, you must use a break-in additive such as Lucas Oil Break-in Additive (which also increases the zinc content). After the critical break in period, synthetic oils such as Royal Purple can be used. Alternate brands that have the CI4 service rating can also be used. "
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I believe Delo 400 and Mobil Delvac are also high zinc content and heavy soot load rated. I run all of them (Rotella, Delvac, and Delo ) in my stuff but not the M-B
Our independent testing agrees with Comp Cams findings. Therefore, we are recommending either the use of SHELL ROTELLA oil with a 15w40 weight during the initial start up and during the break in period of your Blueprint engine. If you wish to use another brand of 15w40 oil, you must use a break-in additive such as Lucas Oil Break-in Additive (which also increases the zinc content). After the critical break in period, synthetic oils such as Royal Purple can be used. Alternate brands that have the CI4 service rating can also be used. "
Return to Tech Tips Main Page
I believe Delo 400 and Mobil Delvac are also high zinc content and heavy soot load rated. I run all of them (Rotella, Delvac, and Delo ) in my stuff but not the M-B
