Motor Oil and filters

[Indianspringsaz]

Originally Posted by TheSilkySmooth

The yaras 1NZ engine can be hard on the oil due to the inverted bucket tappets and the cam chain drive. Luckily the valve spring pressure is really light - IIRC about 40LBS closed - but you can still get galling of the lobe due to high ramp rates and mass acceleration at high rpm. The problem with PAO based synthetc is its not a good lubricant. That includes most amsoil and Mobil 1 (at least the M1 with majority PAO base), DIesters POE and AN synthetics have much a better inherent lubricity and polarity that PAO based syns lack. Source Motul and Fuchs silkolene for the "best" synthetic oils.

First I have heard of this. Would you post some references? I am interested in oils, and always learning something.