A new and controversial? oil thread....hmm

[Killer2600]

Rotella has been reformulated over the years but it's still top choice because it's cheap and is safe for wet clutchs. I doubt anyone has really done any scientific tests to compare rotella to any other oil on engine wear and lubrication. It's more like a "why should I buy this expensive 'motorcycle' oil when this cheap diesel oil works in engines that can go 1 million miles before overhaul."

New diesels do not have extra cats. What they have is a separate urea tank and a separate chamber to burn all the ash out of the system. Less efficient and a silly law since diesel ash does not harm anything.

I hate to be technical but you can't burn ash, ash is what's left after something is burned. The DPF (Diesel Particulate Filter) captures the soot and during regen burns the soot so it becomes just ash. The DEF (Diesel Exhaust Fluid) acts as a catalyst and converts green house gases into earth friendly gases/vapors. The cumulative effect being the air coming out the tail pipe is cleaner than what goes in the air filter.

[Nessism]

I believe some newer diesels DO have cats.