Quote:

Quote:

My posts were at no one in particular. Yes, and you did say "some". What my comments are pointed at are statements like this:

"It's been mentioned that the high detergent washes off the ZPPD stuff."

And this:

Detergents affect the surface tension of the oil. When the engine is shut off a high detergent oil will run off surfaces quicker than a low detergent. Picture rain water running off freshly waxed paint compared to clinging like a sheet to unwashed paint."

And this:

"Joe Gibbs is another company that says the ultra-high detergent levels in Diesel oils harm the effectiveness of the ZDDP."

With no test data or source (web link) to back up their statements.




Junky, you raise good points, but keep in mind...DELO oils were not engineered for our flat tapped gasoline V8s. Ive spoken directly with several Chevron engineers (I've purchased over a million gallons of DELO 15w40 over the years) who tell me the zinc in their oil is for the punishment that the small end of the rod endures during the uber high compression of a diesel. The detergent is there to keep soot in suspension.

Gasoline engines have different requirements. Yes, DELO oils ARE good, but for our use, I believe there are better answers.

BTW, did you know Chevron DELO is a synthetic blend (at least technically--thank you Castrol)? It just hasn't been marketed that way. It's about to though---DELO XLE ( as opposed to LE) is just about to hit the streets.




You said: "The detergent is there to keep soot in suspension.".

Exactly, it doesn't wash away the zinc. It has no effect on zinc according to the engineer I spoke with today at Chevron. Yes, there is better motor oils to use and worse. Saying that does not mean that Heavy Duty Motor Oil aka Diesel Oil is bad to run. It's an option. Just like some will only run Shell, or Valvoline, or Chevron and so forth.

It rubs me the wrong way when people come in here and start making statements that are assumptions, or hearsay, or opinion or whatever but state it as fact. Who knows what Joe Gibbs industry really has to say about the subject? No one seems to really know but are ready to tell everyone.

Still no supported test data or sources submitted.

Carry on.


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