Rotella Oil Question

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   Back when we were going thru the engine on the D15, was reminded to go back with a high zinc motor oil. Have been using MFA 10-30 synthetic diesel oil, which doesn't mention zinc, but that may be a given? Or not.  It is what I have been using in the D15 and hay monster, which is a 318 Chrysler, which also needs the high zinc. 

Then was offered a deal on Shell Rotella Triple T. This stuff. Good to go or do I need to switch to a racing oil which has the "high zinc" thing right on the bottle? 

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modirt Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Access Joined: 18 Jul 2018 Location: Missouri Points: 8654	Post Options Post Reply Quote modirt Report Post Thanks(0) Quote Reply Topic: Rotella Oil Question Posted: 5 hours 20 minutes ago at 5:14pm
	Back when we were going thru the engine on the D15, was reminded to go back with a high zinc motor oil. Have been using MFA 10-30 synthetic diesel oil, which doesn't mention zinc, but that may be a given? Or not. It is what I have been using in the D15 and hay monster, which is a 318 Chrysler, which also needs the high zinc. Then was offered a deal on Shell Rotella Triple T. This stuff. Good to go or do I need to switch to a racing oil which has the "high zinc" thing right on the bottle?

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modirt Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Access Joined: 18 Jul 2018 Location: Missouri Points: 8654	Post Options Post Reply Quote modirt Report Post Thanks(0) Quote Reply Posted: 5 hours 16 minutes ago at 5:18pm
	Shell was pretty tight lipped as to any helpful knowledge about this oil? Synthetic or mineral? Zinc? Yes? No? Maybe? Gas or diesel? Maybe all the codes are supposed to give you guidance. They do say it meets specs for Caterpillar........they don't make many gas engines, so maybe diesel use is implied?

evan austin Members Profile Send Private Message Find Members Posts Add to Buddy List Bronze Level Joined: 01 Jul 2021 Location: Gaston Indiana Points: 15	Post Options Post Reply Quote evan austin Report Post Thanks(0) Quote Reply Posted: 3 hours 27 minutes ago at 7:07pm
	The code to look at on the back of the Rotella bottle is the "SM" rating. SM is a fairly new (ie maybe 10 years old?) rating, and it has a reduced amount of zinc. Newer ratings, SN, Sn+, SP, all also have reduced zinc. When I ran Rotella in my tractors, I used the T1 sae 30 weight. It didn't have an "S" rating for gas engines, but it is rated for "older off road use engines." My poison of choice these days is Mobil Delvac 1630, sae 30 weight. It has the "SF" rating for gas engines, which will have the higher level of zinc. If you want a multi weight high zinc oil, I know they are out there, but I'm not real familiar with any. I use 10w30 in the wintertime, but I've never been too concerned about high zinc oil for that since I don't put many hours on in the winter. For summertime, I still like sae 30. Nothing in this post is gospel, this is just what I do.

steve(ill) Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Access Joined: 11 Sep 2009 Location: illinois Points: 87520	Post Options Post Reply Quote steve(ill) Report Post Thanks(0) Quote Reply Posted: 1 hour 24 minutes ago at 9:10pm
	that Rotella bottle says ---API-- CH4- CG4- CF4..... on the back... the "C" is diesel spec..... gas oil is "S"........ it IS a high zinc oil... Google -------In engine oil specifications, "S" and "C" denote the type of engine the oil is designed for. "S" stands for "Service" and is used for oils in gasoline engines (also known as spark-ignition engines), while "C" stands for "Commercial" and is used for oils in diesel engines (also known as compression-ignition engines). The second letter in the specification (e.g., SN, CF) indicates the oil's performance level, with higher letters indicating better performance. Edited by steve(ill) - 1 hour 13 minutes ago at 9:21pm
	Like them all, but love the "B"s.