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Old 01-06-2016, 11:42 AM   #1
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Anybody in the mood to talk best Diesel oil??

In getting ready for my next oil change, I wanted to see how many people are using Delo400LE (Chevron) purchased from Costco.
They currently have it for 3gal/$40

I am currently thinking that any oil with CJ-4/SM API rating should be fine.
I know Freightliner ships its engines with Valvoline - Premium Blue.

Since I am usually under 6K miles per year, no need for a Synthetic.

What other opinions are out there??



2014 40QBH Phaeton DP Cummins 380HP ISL, Freightliner XC, 2014 Jeep Trailhawk TOAD
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Old 01-06-2016, 11:50 AM   #2
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I buy Delo 400 or Valvoline Premium Blue, whichever is cheaper. The engine doesn't know the difference.

$3.33 a qt. isn't bad.

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Old 01-06-2016, 12:18 PM   #3
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I worked for a mid size city, public works garage, for 20 of my 35 year career

We used state bid engine oil in everything, as long as it met the specs. The bids would often change every year.

I can not recall any "oil related " failures. Lack of oil, damaged oil pans, and faulty intake systems killed the engines.

The last 15 years I managed a facility where we would routinely get 20,000 hours on our wheel loader and stationary Cat engines using the same state bid oil.

I use Walmart diesel engine oil in my Volvo Penta Marine engine and Walmart regular oil in my V 10 Ford.

IMO, you just need to meet the specs.
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Old 01-06-2016, 01:15 PM   #4
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I buy Shell Rotella-T, 15W-40 at $12.99 + tax a gallon from Farm & Fleet, here in the mid-west.
Jim & Jill
Sold: 2010 318SAB Cougar:New: 2016 Cedar Creek 34RL. 2008 Dodge 6.7LCummins the original 6.7L engine, w/68RFE Auto
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Old 01-06-2016, 02:29 PM   #5
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I've used Delo 15W40 in my '89 Dodge Cummins since we got it in in '93. It has 286k camper hauling miles on it now, and is still going strong.

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Old 01-06-2016, 02:37 PM   #6
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I normally use Rotella T, which I get at Sam's Club in a 6 gallon package for $70 (my ISL takes 28 qts). I also used Tractor Supply's house brand of 15W40 once too - it is also API CJ4 rated. They had a sale when I need it and I saved $20.

I usually choose a brand name (Shell, Chevron, Mobil, Castrol) but will use a privat elabel brand if it meets the API specs and the price is good.
Gary Brinck
2004 American Tradition; 2014 Buick LaCRosse
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Old 01-06-2016, 02:38 PM   #7
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I like the convenience of buying the Rotella in the 2.5 gallon jug at Walmart. For me, it's not so much about the brand, but the regularity that you change it. Not a big issue, but once I select a brand, I stay with it in that motor.
Don & Mary
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Old 01-06-2016, 02:43 PM   #8
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I use Rotella in my tractor motor
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Old 01-06-2016, 02:54 PM   #9
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I called Cummins and asked what I should run in my DP....330hp Cummins turbo.
They said they recommend Delo and Rotella....I run Rotella T-5 synthetic blend 15w-40....and this is the same oil I run in our Onan diesel genny.
I am NOT saying this is the perfect oil I am just saying this is what Cummins recommended.
I do agree with changing the oil on a regular basis...with a filter change naturally.
I am toying with the idea of going FULL synthetic....not to be a thread thief but anyone run full synthetic??
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Old 01-06-2016, 03:06 PM   #10
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I have used Delo 15W40 in my 2006 Duramax from day one. That's what they used in the factory when it was built, so that's good enough for me.
1999 NEWMAR American Star * Newmar Kountry Kklub # 19708 * THOUSAND TRAILS * 2006 Chevy 3500 Dually Dmax/Ally * Curt Q20 * Prodigy P2 *US ARMY 1965-1967 * Vietnam Veteran 1966-1967 * Life Member VFW *
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Old 01-06-2016, 03:23 PM   #11
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Any major brand CJ-4 certified oil will serve you perfectly. I've used them all, but prefer Delo over Rotella or Delvac simply because it looks better coming out of the jug, but it's probably no better than the other two, just my preference.
2005 Newmar Dutch Star 4024
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Old 01-06-2016, 03:31 PM   #12
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Oil I use

I have done a lot researched about various types of oils for my Caterpillar 3126 Diesel and my other gas engines. I just did a oil change and I used Full synthetic
Rotella 15w 40. Dino Oil doesn't do a complete job lubricating until it reaches operating temperatures. On the other hand synthetic oil starts to provide better start up lubrication. Most damage to an engine is at start up until it reaches operating temperature. Synthetic oils will not lose their viscosity like dino oil.
That's why synthetic oils have a longer change interval. I change out synthetic Rotela in my pick up about every 7,000 miles. In my Dutch Star I'll change it out about every 2 years regardless of miles. I do send a oil sample in to a lab for testing. I have be pleased with the results I have received. I pretty much rely on their recommendations about the change out. I have had dino oils results showing break down of viscosity with these tests.
You may not agree on my methods but it works for me and I have had vehicle with over 300,000 miles on them, Their is a lot of good information on the internet regarding oil,
I found Full Synthetic 15w 40
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Caterpillar 3126 If it's not a CAT, then it's a DOG!
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Old 01-06-2016, 06:00 PM   #13
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Rotella t-5 15-40?

Paramedic 1, T-5, 15-40w. I was unaware that Shell had a 15-40 syn. where did you buy it?

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Old 01-06-2016, 06:25 PM   #14
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Rotella from Walmart changed annually.

1997 37' HR Endeavor, 275hp Cat, Freightliner
03 CR-V Blue Ox, Ready Brake
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