Voldi, his point with the Rotella syn was that he was jacking his oil change interval up from 5,000 miles to something a lot higher and his mates chided him for excessive build up of minerals in his oil analysis (air borne dust and dirt).
Our bikes don't have good enough air filtration and we lack the bypass oil filtration to really utilize the full mileage potential of Rotella Synthetic (which could be as high as 15,000-20,000 miles on a motorcycle). So he went back to plain old dino Rotella as he was getting 5,000 miles per change on white jug dino Rotella T and it was a lot cheaper for him to change out.
So, the guy with all the 210,000 motorcycle miles finally concludes that he can buy the cheapest diesel oil (CJ-4 rating) that he can find and still keep on racking up the miles .... hey, he has the miles to have the opinion and I don't dispute his feelings. Diesel oil is good stuff.
Why do I use Rotella Syn? My Savage is an air cooled engine that can get into extreme overheating scenarios and get way way hot -- so I like the extreme overheat resistance of the Syn oils. Plus it "warms up" instantly in the winter
(no warm up lag at all) and I find I like that.
Plus I'm a wicker, and I do like the revvability of the engine when using the stuff. It makes as much difference in performance as unstopping the air intake system did, which says a lot for the oil actually making a positive change in your riding.
(and yes, I expect folks to call me on this statement if they don't find a similar experience after the first two (2) crankcases of the new Rotella Syn T6 oil -- as the first one will clean all the crap out of your engine and scare you to death because it got all nasty in such a hurry -- all the detergents and soot dispersants will flat give your engine an enema during that first oil change)
Plus I am interested in the wear characteristics of this syn oil vs a known very good dino version of the same oil that was good for 210,000 miles. You got comparative data on rings, bore and other motor parts referred to here ... (you want to let your rings & bore wall break in before going to the stuff -- or they never will apparently)
http://www.shell.com/home/Framework?siteId=rotella-en&FC2=/rotella-en/html/iw...============
I wouldn't put diesel oil in any catalytic converter equipped car that is relatively new or that is EVER going to get any form of emissions control testing. ZDDP will kill any new 2nd generation catalytic converter and all modern cars have them as standard equipment.
Conversely, I have a 20 year old car that I do put the stuff in as my catalytic converter has been shot for over a decade and my 1990 vehicle is not subject to EPA exhaust pipe tests (grandfathered).
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And yes Bill, we know it hurts.
At least I'm not twisting the knife or doing any of the mean stuff Verslagen or Justin do to you when you lost an oil war.
Actually, I feel sorta bad setting you up like that ....
(fish in a barrel and all)
But it is good to see you "never say die" no matter how bad it gets.