Quote:
Originally Posted by Jupiter Rover
did it not say in the article that you do not want Too much ZDP (b/c of the phosphorous), or else it would cause wear and cause the cam to "spall". you need the right amount..
is that right?
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What they were saying is that above 1400ppm may be alright for running in a new cam, but will actually shorten the life of the cam if you keep on using it.
Back when motors went to high lift cams, they found that 800ppm was enough to prevent cam damage.
So by default, they are suggesting that between 800ppm and 1400ppm are safe to use in the old type cam motors.
But what they are also stating is that any oil has to be tested on old cam type motors, to prove they have no ill effect, to get the SAE rating. So any oil with a SAE rating should be OK to use.
But based on the oils you have available in the US, it would seem that Mobil 1 15W50 is a good bet. It has the higher shear protection, being a 50 oil. It will flow in very cold wheather with the 15W rating. It also has a ZDP content of 1200ppm. Finally, it is a reputable brand.
But I am sure that there are similar oils in other brands, I just don't have the time or interest to find them. You cannot get the oil I use in the US.
