Heavy Duty Diesel Oils
TRIAX FLEET SUPREME 5W-40 Synthetic
Friction Modified Heavy Duty Diesel Oil, CK-4

TRIAX FLEET SUPREME 5W-40 Synthetic

Friction Modified Heavy Duty Diesel Oil, CK-4

TRIAX Fleet Supreme synthetic diesel engine oils are the ultimate choice for maximizing engine performance. These are state-of-the-art engine oils built with performance as a priority while maintaining complete OEM spec compliance . TRIAX Fleet Supreme oils are fully formulated products, designed to both API CK-4 compliant and to meet and exceed both the API CK-4 specification and all related OEM specifications in the CK-4 family, such as Volvo, Cummins, Detroit Diesel, Mercedes Benz and Ford fitted with exhaust after-treatment devices such as DPF and SCR.

Viscosity Grade:
5W-40
Oil Type:
Full Synthetic
Core Specifications:
API CK-4
CAT ECF-3
Mack EOS 4.5 & Previous
VDS-4.5
CUSTOMER REVIEWS (13)
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REVIEW THIS PRODUCT
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Tom Olson | May 08, 2021
New Purchase through Amazon
Curious how this oil will function in my 2016 Ram 3500, Cummins TD. Will send off for analysis after I run about 10,000 miles. We tow a 10,000 pound Travel trailer about 7000 miles per year. Hope I'm not disappointed with this purchase. Maybe I should have ordered from this site, rather than Amazon.
Steven | Jul 08, 2021
Underrated product
These oils dont get the credit they deserve! Not sure why they don't advertise their oils more. I used it on all my work trucks after doin a test on mine, we regularly get 18-20k miles on each oil change which is basically double what we got with Rotella. Engines run smoother, turbos behave like they should even in really cold temps. If you got a diesel, I highly recommend this. We got trucks coming up for ATF changes and will definitely get a triax atf.
Manfred | Jul 08, 2021
A must for highway truck
I only got one truck, 2017 Peterbilt 579. Tried this after reading about it online and I'm not disappointed. After 4 blackstone tests at 25k, 50k, 75k and 100k miles its STILL ok. Also, 1.2-2 mpg better, Crazy. Rotella woulda turned to slush 30k miles ago. I pull a 20 ton reefer from Houston to NYC and back so an oil like this is worth every dime.
Alex Barns | Jul 08, 2021
Lives up to the hype
Got 25,800 miles on the first oil change in my F350 Powerstroke. no issues at all.
DieselFan | Jul 08, 2021
Quiet
Very very quiet diesel, super smooth.
T.O. | Apr 10, 2024
0
Triax has been in my Ram 3500 now for about 500 miles. Although I have not yet towed with it, I'm very pleased with how the engine responds with this oil. Of course this is subjective, but I'm looking forward to drawing a sample in 6 months after lots of cross country towing. I will be looking at TBN, Iron and other wear Metals, how it holds its viscosity at prolonged elevated Temps under shear stress. So far so good!
T.O. | Apr 10, 2024
0
I had to change the oil prematurely at 3200 miles. We were pulling our 10000 pound travel trailer out to California pulling severe long grades. Oil temps at about 223 degrees, oil was seeping from the oil filter gasket. Looked worse than it was. It was not the oils fault, rather they didn’t tighten the oil filter enough! Sent the Triax for analysis. The Oil tested great, very impressed with results of the analysis. Short run but very severe. Not sure why this oil isn’t in stock. Will probably switch to the 15-40.
JP | Nov 09, 2022
Work truck
Run this in my CAT powered truck with great results thus far. Decided to try it in my little shop truck with a semi-tired v6 in it that started making some top end noise upon start-up... I'll be darned if it didn't immediately quiet the little sucker right down. Pretty cool, and I can't argue with the results!
M.C. | May 26, 2023
Question
Is the new upgraded formulation going to get the API-SP rating? Mysteriously, Chrysler want's API-SP as mandatory for Gen3 EcoDiesel's and there are a lot of API-SP oils with HIGH SAPS out there which makes no sense whatsoever. Here's the wording of the requirement from the manual. Oddly, the correct spec is "recommended". Here it is straight from the manual "We recommend using 5W-40 synthetic engine oil such as Mopar® that meets the manufacturer Material Standard MS-12991 and the API SP engine oil category is required." MS-12991 should have been the requirement (LOW SAPS) and API-SP as optional in lieu of API-SN being that API-SP oils are designed to help prevent LSPI, a type of engine knock that that concerns ONLY gasoline engines. I wrote them for an explanation and they went silent.
TwinPowerStroke | Jun 18, 2023
Injectors love
Running 3 power strokes on our farm and since we used this oil goodbye hard starts and no more injector issues. After about 80,000 miles we had to replace a controller and pulled out the injectors to check them and they are super clean, zero gunk. Im guessing thats why we have no more stiction. Will keep buying it.
JLind | Apr 05, 2024
Plant Manager
Have been using TRIAX in my Cummins ever since I drained the factory oil. People are always commenting on how quiet my diesel is. I have noticed a 1.2-1.5 bump in mpg. I have done some other modifications to the truck so I can't say for sure if it's the oil or the mods. I will be interested to see what Blackstone Labs say about this oil change I have coming up.
Jamie T Pearson | May 22, 2024
Hard to fine this oil in a 5 w 40 but i am sure it will work in my Massey 1840 E
Carlos at Azteca Electrical | May 24, 2024
President
I would like to review on my Triax diesel 5-40 diesel oil. This is an excellent product for my 2007 f250 Harley Davidson 6.0 PSD. My truck runs smoother, cooler, quieter, and gives me rapid starts every time. It has also given me 1.7 miles more per gaallon I have shared my personal experience with friends and most are now using this product. I also use Triax 5-30 motor oil in 3 of my other vehicles and have had a great experience with this product. Mileage is up from 1.2 miles to 1.8 miles, they run quieter, smoother and also with rapid starts every time Have finally found my new oils.
PRODUCT QUESTION
To add a question you must:
QUESTION:
Why don’t you add the Chrysler 12991 for ecodeisel to this oil
posted by Tim kosek
ANSWER:
We cannot, the MS12991 is built on the ACEA A3/B4 platform, which is not a CK-4 mainline spec. It is necessary to have two products to meet spec. However, will this work in an MS 12991 engine. Yes, it will. The fluid we have as an MS 12991 spec is the Euro VX 5W-40
posted by TRIAX Lubricants Admin

QUESTION:
I’ve got a 2018 power stroke but I only drive it maybe 5000 miles a year. I’m wondering if the oil can last 2 years and maintain the 10,000 mile oil change interval?
posted by Jared Pope
ANSWER:
Yes, it should be able to last two years.
posted by TRIAX Lubricants Admin

QUESTION:
2007 F250 6.0 power stroke in Phoenix Az., with summer weather around 105 to 115 degrees, I want to hight use your product, so will I be using , 5-40w or 15-40w? Thanks
posted by Carlos Yado
ANSWER:
You should have no issues at all with either of them. The high temp viscosity is the same on both, 40.
posted by TRIAX Lubricants Admin

QUESTION:
Do you feel there is enough zddp, and/or the correct additive package in the 5w40 to use it in a flat tappet cammed gas motor? Looking to standardize our inventory.
posted by jeff patterson
ANSWER:
Hello, its not a question of "feel" its a question of spec. Yes, there is enough Zddp for flat tappet motors. The Boron and moly also help dramatically with wear, its not just about the Zddp. Hope that helps.
posted by TRIAX Lubricants Admin

QUESTION:
Why does this show Daimler MB229.51 and not Mercedes MB229.51 ? Is this oil suitable for a 2008 GL2320 CDI?
posted by Neil Horden
ANSWER:
Yes, it should work very well. That vehicle. The specification can be denoted in a few ways, both are correct and mean the same thing.
posted by TRIAX Lubricants Admin

QUESTION:
Fleet Supreme ESP CK 5W-40 states Sulfated Ash at 0.97 ppm. Areas of the website and product have stated this oil in 5W-40 meets 229.51. My understanding is 229.51 requires <0.8 % of wt Sulfated Ash. Please clarify.
posted by Keith Weedin
ANSWER:
This product is a 228.51 not 229.51. The 229.51 is a passenger car diesel specification.
posted by TRIAX Lubricants Admin

QUESTION:
When will be back in stock
posted by Randy Krause
ANSWER:
January 12, 2023. Product is getting upgraded formulation.
posted by TRIAX Lubricants Admin

QUESTION:
Have you had anyone ruin this oil with smaller VW TDI engines, specifically PD injection 1.9TDIs 2005-2007? It requires VW 505.1 oil, but it seems this may have some of the same additives, plus much more.
posted by Lucas Drew
ANSWER:
Yes it does, it will run exceptionally well in VW TDI engines. Its not officially spec'd for it, but works great.
posted by TRIAX Lubricants Admin

QUESTION:
should I purchase 5w x 40 over 15w x 40 to extend life of the motor and diesel mileage...it gets below 0 Fahrenheit in Colorado
posted by MARK DORN
ANSWER:
You should have no issues with the 15W-40, it pours down to - 30 F, the 5W-40 down to -45 F. Performance wise both are the same. The best bet would be the 5W-40.
posted by TRIAX Lubricants Admin

QUESTION:
Is 5 w x 40 better for 6.0 Ford diesel than the 15 w x 40 and why is that so? What are their differences as to the engines lubrication and performance?
posted by MARK DORN
ANSWER:
Both the same, just one pours better than the other below - 30 F
posted by TRIAX Lubricants Admin

QUESTION:
FLEET SUPREME PRODUCT Q: Is 5 w 40 Diesel better for work 6.0 Ford F-350 vs. 15 w x 40 or should I continue with 15 weight x 40...what are benefit differences...noted that Semi trucks running this oil high miles vs. pickup versions 10K or so why is this different between engines...??? Thanks like what I have seen...Amazon sucks...would prefer to see you get more profit and cut them out...believe this man to be traitor to our nation as a global reset supporter. Nation and truckers at the crossroads as oil is non-depleting resource from the earth like water...Earth makes it continuously...tired of the lies and manipulations against America...opinion spoken by deep researched disabled veteran
posted by MARK DORN
ANSWER:
The information on Amazon comes from us. The semi trucks go much longer because of the much larger oil sump, not the engine. There is some difference in oil longevity between engines but very little. Pickup trucks can get as high as 25,000 miles, especially the F250, 350s and the Dodge. The semis can go beyond 150,000 miles as their sump is considerably larger.
posted by TRIAX Lubricants Admin

QUESTION:
Compatible for 2018 ram ecodiesel?
posted by Ronald Fong
ANSWER:
Yes, it is.
posted by TRIAX Lubricants Admin

QUESTION:
I have a commercial building a forklift for unloading but no loading dock , can I still order? I have delivers all the time and have no issue’s if the trucker carries a pallet jack onboard to bring the pallets to the back of trailer .would like to order a 55 as I have 10 trucks .thanks
posted by Dave Cassell
ANSWER:
Sorry about the late reply, your question was for some reason stuck in the approval queue. Regarding your question - no problem, yes you can order and we can deliver it.
posted by TRIAX Lubricants Admin

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