[linderpat]

Originally Posted by JFP in PA

Synthetics are a different world; they have higher heat transfer capabilities than conventional oils, lower surface tension (hence your leaks), lower coefficient of friction, much higher shear capabilities, etc., etc. This is why they have taken over the high performance market. They are simply a much better product.

As for quieting lifters, as this problem is related to the incredibly small oil passages in the valve train oiling system, synthetics should do a better job because the flow more easily. One trick you might want to look at is to go with a higher film strength synthetic, replacing a 0W -r 5W-40 oil with the same brand 10W-40.......

thanks Jeff - that makes sense. I will try the slightly heavier weight and see what happens.