Scott Casler of Hummel Engines recommends Rotella for any VW application, for the zinc content. That goes for cars too. As I understand it, the metallurgy of auto engines changed in the 80s to be compatible with the mandated lower zinc levels in oil. So I suppose that means if you didn't give up your Bricklin to Cash For Clunkers, it would be wise to run Rotella.
Chris On 4/27/2016 5:28 AM, Mark Langford via KRnet wrote: > Speaking of oil, the CorvAircraft community has been using Rotella > 15W-40 oil for years now, given that it has one of the highest zinc > contents.
