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 better even than the old oils.
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
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I am absolutely ready for an even better RTS!

Rotella T is the conventional oil right?I don't think the synthetic is listed as "T"... unless it just came out.

I have 2500 miles on my 08 LMM and I just bought 3 gallons of Rotella T 15/40 today. I have used Rotella T 40w in the old Detroits in my boat for years and am really happy with it.

Hopefully it will do well in the Dmax!

K

The Shell Rotella that i bought about 4 month's ago says Rotella "T" Synthetic 5W40 on the label. So yes there is a Rotella T synthetic. It is CI4+. I guess the new oil coming out will be CJ4.

Shell Rotella® T Synthetic SAE 5W-40 is a fully synthetic heavy-duty diesel and gasoline engine oil developed especially to meet the requirements of North American driving.

I'll have to see what my jug says, I didn't think it said T but maybe it was.It was a blue jug.I do remember it was CI not CJ rated.

Sorry for the confusion. "RTS" is the abbreviation for Rotella T Synthetic in the blue bottle over on BITOG.

Regardless, sounds like the new Rotella "synthetic" will be out soon!

Many people have had good luck with the bargain priced Rotella Syn up till now. I wonder if their CJ-4 version will have the capability to protect a heavy duty Detroit Diesel, Mercedes Benz, CAT, or Volvo engine. The current CI-4 Plus spec listing on Shell's web page does not state the required specs for use in a 2002-2006 version of any of these engines (only 2001 and older engine suitable). A heavy duty Diesel oil that doesn't meet the spec to protect a CAT, DDC/MBE, Volvo seems a bit odd.

What is the SRT in terms of a class 3 or class 4 oil? I don't understand what these classes are, but I remember AMSOIL is supposed to be a Class V PAO is this correct?

Shell Rotella® T Synthetic SAE 5W-40 is a fully synthetic heavy-duty diesel and gasoline engine oil developed especially to meet the requirements of North American driving.
:confuzeldThe Rotella T 15/40 is CJ-4. The Rotella T 5/40 SYN. is "not" CJ-4. That is what the bottles read at the local wallyworld. I wanted to use the Rotella but was wondering if the 5/40 SYN was going to be available. I guess it is "old school",I have always tried to use the same oil over the lifetime of an engine. JUST WONDERING. :confuzeld

PAO is in the group 4 basestocks. Most AMSOIL products are either group 4 or a comination of 4 and 5, depending on the product. All proprietary, so don't know the exacts. The restrictions on SAPS in the new CJ-4 oils by the EPA, one of which is phosphorus, is part of the ZDDP and brought down levels for both. These new oils still provide great protection, but the biggest concern is in high performance engines and flat tappet cams where high levels of zinc are desired. And as mentioned in breaking in these motors.

Many people have had good luck with the bargain priced Rotella Syn up till now. I wonder if their CJ-4 version will have the capability to protect a heavy duty Detroit Diesel, Mercedes Benz, CAT, or Volvo engine. The current CI-4 Plus spec listing on Shell's web page does not state the required specs for use in a 2002-2006 version of any of these engines (only 2001 and older engine suitable). A heavy duty Diesel oil that doesn't meet the spec to protect a CAT, DDC/MBE, Volvo seems a bit odd.

Do you think they are just formulating it for light duty trucks diesels? Do the new big rig diesels have the same DPF requirements as our trucks?

The big trucks do have them. Adds 7-8 grand to the price of the truck and they only last about 150000 miles before they need cleaned or replaced. Cleaning of these filters is going to be big business!!

It doesn't look like Shell tried to make a light duty syn Diesel oil - why would they try to list outdated heavy duty specs? Most Wally World buyers have no clue what the heavy duty specs mean - they focus on the lowest performance hurdle, which happens to apply to them, the API spec. Rotella is a well known diesel oil brand; my guess is that they are trying to capture more light duty customers who will likely never realize that their heavy duty oil is lacking for many key heavy duty OEMs. This might influence the bargain pricing we see. Despite this, many light duty users have had good luck with it in their light duty application.

Light duty conditions are different vs big semi trucks. Some people might value the peace of mind of using a more robust synthetic oil that is actually able to protect a CAT, Detroit Diesel, Mercedes Benz, or Volvo.