Topic: OMG an oil thread!!

[scottly]

I'm also a fan of Shell Rotella. It's non-detergent
 

Rotella IS a detergent oil! In fact, diesel specific oil has more detergent than standard oil, due to the dirty burning fuel.

[Godffery]

I'm also a fan of Shell Rotella. It's non-detergent
 

Rotella IS a detergent oil! In fact, diesel specific oil has more detergent than standard oil, due to the dirty burning fuel.

Oh okay, I stand corrected. 

[HondaMan]

Rotela's diesel-rated oils are not detergent-y. It causes havoc in diesel engines if it foams.
When I worked in the oilfield this was a huge deal: guys got fired for ever getting it mixed up, and those big trucks used 4-6 gallons of oil per change. The V-24, 4800 CID frac engines used 32 gallons of it.

[scottly]

Rotella diesel oil has a high level of detergent. When a diesel engine is run with standard oil for any length of time, the rings get so gummed up with carbon that the engine develops "Enough blow-by to float a Cat-Hat over the breather". The reason people started using it in our old bikes and cars is because it still had the zinc in it, when they phased it out of oil for new cars.