Maybe consider changing the oil once a year even with low miles.
That article was updated 1/26/22 and is still recommending 15w-40, tells me to not trust anything they say. I do trust what Ram and Cummins say.
Best Oil for 6.7 Cummins: Keep Your Engine Running SmoothlyLooking for oil for your 6.7 cummins? Our team of experts narrowed down the best oil for 6.7 cummins on the market. Read this review and save yourself time and money.www.thedrive.com
Surely this is not the final word on oils for our engines but a thought.
I thought of trying the 15-40 T5. Never thought of the other oils mentioned here. Did notice a few comments about T6 in both 5-40 and 15-40. Will do more research soon. Surely I do not want unusual deposits in my hydraulic valve system.
AXI University said:There is nothing worse than opening your tank to discover your diesel fuel is contaminated with “algae“. If this fuel were ever to be used, it could wreak havoc on your fuel filters and consequentially your engine. ...
A Common Misnomer
For decades, it has been a common misconception that the dark sludge forming in your fuel tank is actually “algae”. As a result, many still refer to it as such today. In reality, what you are actually witnessing is an over-proliferation of microbes in the fuel. ...
The problem of microbial contamination originates when water present in the diesel separates into a distinct layer below the fuel. This is commonly referred to as "phase separation". At this point in the process, you may begin to notice a dark layer forming in the fuel.
Another term often used to refer to this form of fuel contamination is the “diesel bug”. ...
I've got some of that Valvoline, it's good oil. Also have T6, my go to oil. And have Mobil-1 Delvac 1 ESP, another good oil. Always use 5w-40 in my Eco and my HOI've been using the Valvoline Premium Blue Extreme full synthetic 5w-40.
I bought my last carton (3x 1 gallon jugs) for $82 from Amazon delivered for my 2021 2500 Cummins truck. https://www.amazon.com/Valvoline-Premium-Extreme-Synthetic-Diesel/dp/B06XFS3GQS?th=1
I would of used Rotella, but when I needed oil, there wasn't any around. The Valvoline is good stuff and I'm Ok with it.
I find trying to buy oil at a auto parts store anymore is a crap shoot, it seems availability is sketchy at times for any brand. Amazon makes it too easy to order, fast too.
Had major issues with algae in my 1966 Ford 2000 tractor. It took out the injector pump twice before I figured it out.