Quote:
Originally Posted by bobcowan
60*C = 140*F.
I would not recommend a 15W oil. Too thick when cold to really lube the engine well in that first 60 seconds or so; where most engine wear occurs. I would change to a 0W or 5W. |
Bob,
Thanks. Not sure why I didn't see all these responses over the past few days?
Anyway, I agree the 15W40 is probably a little viscous, but everything is a compromise. The engine builder recommended 10W40 Honda motorcycle
oil.
After some research I decided I'd rather have something with higher ZDDP.
Rotella has 1200 ppm ZDDP which I want for wear resistance since I'm running flat hydraulic tappets. The other option is to run race
oil or add $15 of ZDDP additive every oil change. I realize the additional cost is mice nuts in the grand scheme of things, but I also have advice from an ex Chevron race oil engineer that sings the praises of diesel oils (Delo or Rotella) because of their optimum ZDDP at 1200 ppm. Delo has since reduced their ZDDP concentration and augmented their chemistry with other additives. Shell has kept the ZDDP in Rotella constant.