Zn oils - What do you use?

[Y22C]

Originally Posted by DanEC

I've been using Joe Gibbs HR oil but may switch back to Rotella 10W-40 on at least some of my cars. Rotella is still high in ZDDP.

Sorry to say, but due to the new diesel emission standards, and the sensitivity of the emissions control systems on diesels to ash, the zinc levels in Rotella and other diesel oils have been reduced to somewhere in the 900-1000 PPM range.

Ken

[DanEC]

Originally Posted by Y22C

Sorry to say, but due to the new diesel emission standards, and the sensitivity of the emissions control systems on diesels to ash, the zinc levels in Rotella and other diesel oils have been reduced to somewhere in the 900-1000 PPM range.

Ken

I'm still seeing 1100 ppm phosphorous and 1200 ppm zinc - at least in the CJ-4. I understood from this guy that it's phosphorous they have to limit and zinc isn't an issue and often isn't even reported. But - something to keep an eye on. I do like Joe Gibbs - it seems to have really good clinging properties.

http://www.corvetteforum.com/forums/...-corvettes.pdf

[1985 CCX]

That is why racing oil can have higher levels as new cars and emissions are harmed by ZDDP levels. Think even the diesel products are getting changed as regulations increase and emission controls widened. Newer cars are also designed with roller this and roller that so the need for ZDDP is also not required.

Racing oils like racing gas (Cam II) fall into different regulatory restrictions.

[Y22C]

Originally Posted by DanEC

I'm still seeing 1100 ppm phosphorous and 1200 ppm zinc - at least in the CJ-4. I understood from this guy that it's phosphorous they have to limit and zinc isn't an issue and often isn't even reported. But - something to keep an eye on. I do like Joe Gibbs - it seems to have really good clinging properties.

http://www.corvetteforum.com/forums/...-corvettes.pdf

I sit corrected, you are correct on the levels.

I grabbed the wrong analysis sheet.

ken