Stumpalump
NAXJA Forum User
- Location
- Franktown Co.
I just got off the phone with Richard Moore, Shell lubrication engineer. Rottella T synthetic CI4 is 1400 ppm zink. The stuff comming out, CJ4 is 1200 ppm zink. Regular pre 2000 oil was 1200 ppm so the new Rotella is as good as the old oil as far as zink goes. It has a host of other improvments that make it bettter than even the CI4 Rotella T synthetic. It's a group 3 oil and Moble 1 is group 4. As far as bang for the buck goes in a great high zink oil then Rotell T is king. Zink works only above 500 degrees on hot spots. It creats an alloy on your engine bearings or tappets that are very hard and reduce ware. Once you engine is broken in then high levels of zink are not as necessary. I also learned that the zink goes away and gets used up fast. So on a new engine frequent oil changes with fresh zink are needed untill all the high spots on the engine are broken in and converted to the alloy. He lost me on the hydrocarbon chains and super chemistry stuff but but he sent me a link to the new CJ4 oil and belives that the million mile engine reports will turn to reports of 2 million mile engines when they start with the new CJ4 Rotella T synthetic. It's still a diesel oil so it comes with a ton of detergent and other addatives to keep dirt suspended and carbon at bay. I'd say if you switch to the high detergent stuff then let it work and clean for a while and then drain it. It like moble 1 will loosen and clean junk from an old engine and you need to get that junk out before you extend the drain interval.
http://www.shell.com/home/Framework?siteId=rotella-en&FC2=/rotella-en/html/iwgen/press_release_2006/zzz_lhn.html&FC3=/rotella-en/html/iwgen/press_release_2006/cj-4_triple_1006.html
http://www.shell.com/home/Framework?siteId=rotella-en&FC2=/rotella-en/html/iwgen/press_release_2006/zzz_lhn.html&FC3=/rotella-en/html/iwgen/press_release_2006/cj-4_triple_1006.html