piedmontbuckeye
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Go Bucks!
Posts: 496
Easley, SC
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I hesitate to say this, because I don't want this to elevate into an oil war.
I literally contacted a few month's ago, the tech department of Pennzoil about their new Natural Gas based oil and asked them if it would be compatible with the S40s. At the time, I wasn't aware of their connection with Shell.
They wrote me back and said that the Pennzoil wasn't - however they are the ones who directed me to the Rotella T6, because they said that it WAS compatible. That it would not harm or make the clutch slip, and that it did have the 1,200 ZDDP level needed.
True or not? I do not know!
However, I have done what I am about to describe since I purchased my S40. I have used LUCAS oil additive (available in either dino or synthetic) in my oil mixture. I use the recommended 20% mix for all my engines - cars, lawn mowers, etc. However after conferring with the Lucas engineer on the phone, he suggested that on any wet clutch engine, change the mix to just 10%.
This additive does the oil "sticking" thing, keeping the oil residue clinging to the metal parts after the engine is shut off, reducing metal wear to next to nothing as cold startups is where most wear happens.
As I said, I have used this 10% mixture now for over a year in my S40, and for over 7,000 miles, in both cold (40 Degree) and hot (95 Deg.) weather, and have NEVER had any indication of clutch slippage! Period.
My last oil change (after about 2,500 miles) showed the oil to look at least nearly new with no normal-to-used-oil darkening. The magnetic plug had nothing on it of any metal particulate.
I am also using Dave's suggestion of 1 oz. per oil change (oops! correction: 1/2 oz. per oil change!) of the Red Line ZDDP additive which covers the ZDDP issue.
I have been riding, fixing, and rebuilding motorcycles since I was 16 years old (even worked in a Honda/BMW dealership) and have literally thousands and thousands of miles of riding on many brands. I am not a neophyte to motorcycling.
I just throw this out for your info.
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