Originally Posted by crombie09
Rotella is a diesel oil, diesel oils have more detergents in them than gas oils. I've been told by many that running diesel will help clean out the engine.
The benefit to running Rotella is that it's one of the cheapest synthetics you can get.. however, it doesn't have a BETTER detergent package than regular synthetic, it has a different
detergent package specifically for cleaning different sorts of deposits left by running diesel fuel, (most of which your engine cannot take advantage of.)
Taken from Rotella's website:
"Diesel engines are different from gasoline engines in a number of significant ways which also affect the properties required from an oil.
Gasoline engines use different fuels, run faster and hotter than diesels.
Diesels are renowned for reliability and long life, but this relies on the engine oil providing the protection against the type of engine wear and deposit formations specific to diesels engines and fuel.
Shell ROTELLA® T engine oils are developed with the diesel engine in mind, but also meet gasoline performance credentials."
If you really want to clean the engine out, change your oil change interval to 1000 miles for a few oil changes, running seafoam through each time.