Originally Posted by sibhus
I was curious, as a prior poster mentioned Lubegen Bio, in what instances do you decide whether to use this and given its formula, is it preferable to use it with a certain oil. Im thinking of trying this stuff out with my Castrol 0w40.
The Castrol 0w40 is a pretty good oil as it is right from the bottle, personally I wouldn't bother. Fact is a lot of these products were developed and did seem to make a difference at that time many years ago but there is no comparison between oils of yesteryear and today. In old engines I do use ZDDP, there is no real additive in use today that replaces it despite what they claim, cam wear in these old lumps proves it, the Castrol 0w40 has enough ZDDP on its own, extra is not needed except for all out engines with big cams, flat tappets and obligatory high rate valve springs.