Recent content by rksk

I have not studied the current engine manufacturing technologies, but are they still using sand casting for engine blocks, heads and manifolds? Could residual sand from the casting process be a source of silicon in a new engine?

Don't know if my car can be compared to a later model Maxima, but I have a 1979 280ZX with 250,000 miles on it. It has the original fuel pump and starter,(although I have cleaned and relubed the starter bendix a few times in the last 30 years). I replaced the alternator brushes at around...

Guys, thanks for all of the replies! I just changed my oil last weekend and went with Rotella 15w40 (no VII) for the winter. I will continue to monitor oil temperatures, and re-evaluate when the ambient temperatures get warmer (probably next spring). Then I will decide whether or not to add VII...

Thanks guys, I appreciate the responses! Based on the Motorcycle UOA's in BITOG, it appears that most 20w50 oils shear back to a 40 weight fairly quickly in Harleys, while the HDEO's seem to hold their viscosity very well in most motorcycle applications. There were only one or two Harley HDEO...

Thanks for the replies. Can you educate me on why a VII should not be used in this application. I am a noob, just trying to learn.

This is my first post as a new member, although I have been viewing for some time. This site is great, and find it very informative, and also very addictive! Now to my question. I have a 92 FXRS (Harley) with an Evolution engine that specs a 20W-50 oil. I really like the properties of HDEO...