favorite oil
Lead Driver
Joined: Dec 2012
Posts: 7,877
Likes: 49
From: Tennessee
My shop uses Rotella in almost all diesel engines we work on . Only a few customers request other oils like Mobil or Schaffer oil . I have been there almost 14 years . We have Never had an oil related breakdown . I am sure there are better oils , but , I have never seen an issue with Rotella .
Super Moderator
Joined: Dec 2011
Posts: 13,290
Likes: 6,063
Favorite oil: Synthetic and darn near free. I never got the "darn near free" part that some members here were able to fenagle out of AutoZone's sale last month (Mobil 1 Turbo Diesel Truck Full Synthetic 5W-40 for $1.00 per quart!), but many of us were able to get the "near free" price of $13 per gallon, as opposed to the normal retail price of $30 per gallon. When paying only $3 or $1 per quart for synthetic, compared to $8, the arguments for which synthetic is "better" fade away into funds in the wallet.
Post Fiend
Joined: Jun 2004
Posts: 9,293
Likes: 10
From: Parker, CO
I've run just about everything. Valvoline Premium Blue Extreme 5w40 is what I run all the time now.
Back when I ran dual HPOP's, it's the only oil that would hold up over 5,000 miles with far more to go. That's pretty much what sold me.
Back when I ran dual HPOP's, it's the only oil that would hold up over 5,000 miles with far more to go. That's pretty much what sold me.
Senior User
Joined: Sep 2013
Posts: 498
Likes: 0
From: Hagerstown, MD
We have a few million miles on 7.3s running only 15-40 Rotella. I currently run Rotella 5-40 synthetic. However, I feel like the oil debate is apples to apples. You're in good hands with the Valvoline, and I'm willing to bet they make a great product with the backing of a company with the track record and reputability of Cummins.
For me, it's just a if it ain't broke, don't fix it thing. Although I've thought of switching to Schaffers at times.
For me, it's just a if it ain't broke, don't fix it thing. Although I've thought of switching to Schaffers at times.
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Super Moderator
Joined: May 2004
Posts: 29,380
Likes: 118
From: Central Coast of CA
Stewart
Fig if good enough for a 250k IH combine it should be good enough for me .
And the price not bad either!
Freshman User
Joined: Jun 2011
Posts: 29
Likes: 0
From: New Jersey
Rotella for me since price is ok and its easy to find; synthetic 5w-40 in winter (huge cold start improvement) and 15w-40 when weather is warm.
Don't think brand matters much as long as you're using cj-4 (ci-4plus) diesel spec oil - stick with whatever works.
Don't think brand matters much as long as you're using cj-4 (ci-4plus) diesel spec oil - stick with whatever works.