Hey guys whats the best engine oil to use in these 6.7 with all the EGR crap on it ?

 

i use chevron delo 400le 15w40

 

I am quoting from Turbo Diesel Register . Com in issues 76 May/June/July 2012. On page 52 the topic is lube oil version 2012 in this article the author discuss the new oil requirements for the API CJ-4 oil. His final recommendation is to use Shell Rotella T 15W-40 as the best oil for cost/price/value for the Cummins engine.

You can read the article on like; if you Google it. TDR.COM has done several studies and published them in their quarterly publication and our available online.

I have been using this oil for my last four oil changes and have had excellent results as far as my oil sampling and driving usage with my truck.

Jim W.

 

I've been running Valvoline Premium Blue in both my '06 and '08 without any problems. I do plan on running some oil tests this summer via Blackstone just to make sure everything is fine.

 

I also use Shell Rotela 15W-40 CJ-4 oil. If I can't find it I'll use Mobil Delvac, same specs. Mobil is usually about a dollar/gallon less at Walmart. Since I change my oil more frequently than required I don't think brand makes a difference. Just gotta make the specs are right for the Cummins.