Oil selection (10/2009)

[zrayr]

Originally Posted by undy

I've been wrestling with switching from the Rotella T to the Mobil 1 15w40 myself. I really could care less about ZDDP levels as I'm running a hydraulic roller. I just want the best lubricity possible. What has me holding back is the reported smaller molecular size of the synthetic oils. They tend to have the propensity to leak a little more. I've read it but quite frankly knowingly have never experienced it. It still gives me concern. I don't want to give my leak prone FE a reason to leak any more..............."

if leaking is your only concern, I'd give it a try. You can always drain it if you find it not to your liking. The greatly reduced wear is what sold me on synthetic oil. I can put up with a little leaking if thats my tradeoff. But when I had an FE powered Ford, it didn't leak using Mobil 1 15-50 (and neither does my 289, even with some nasty crankcase pressures.

Z. Ray