[Jake Raby]

The fewer miles between services the more oil is sold, and the more service is needed... Don't get me wrong, I mandate 5K mile services on my engines and believe greatly in keeping the contaminated oil out of these engines.

BUT not every selection that is made by companies is made because brand XXX is the best, in some instances it only means that someone got paid under the table to make product XXX applicable to of a certain manufacturers engines.

I personally know professional race teams who run a Mobil 1 decal on their car but you won't find that oil in their engine..

If anyone thinks that recommendations are only made for the sole benefit of the car/ engine they are sorely mistaken.

When new engines come from Porsche they are shipped with oil in them. I recently collected some of that oil when I dismantled an engine that we bought from Porsche to take apart and use for reference/ comparison. A oil analysis is being done on that oil now to see if it has the elemental levels that are generally associated with M1.

I'll close by stating that data can also be derived from simply observing the characteristics of an engine with different oils during start up and operation.