How Often do You Change Your Oil

[Cliffman]

Manual says every 15k or 6 months but I'm wondering why the every 6 months. I use Amsoil and I don't drive it much except when we go on trips pulling my 18k 5er.

 

[wyosteve]

I change mine every 15k.

 

[Cliffman]

I change mine every 15k.

Do you hit the 15k before the 6 months?

 

[SSchang]

I haven't changed the oil yet in my 2020, only has 11,500 miles. Will change it in late January, one year after I bought it, unless I hit 15,000 miles before then. Doubtful, as camping season is about over and snowmobile season will just be ramping up. If the truck isn't hauling the camper or pulling the snowmobile trailer, it's parked in the pole barn.

Scott

 

[gsbrockman]

Generally between 13,500 miles and 15,000 miles. All of my oil changes are well within 6 month intervals. Looking at my first thirteen oil changes, they average 14,188 miles and 249 drive hours in interval.

 

[lpennock]

I change my at 12.5K or 12 months which ever comes first. It is a bit of warranty risk as the manual requires 6 month; however, I have a pretty good dealer so I doubt it will be much of an issue.

 

[gsbrockman]

I change my at 12.5K or 12 months which ever comes first. It is a bit of warranty risk as the manual requires 6 month; however, I have a pretty good dealer so I doubt it will be much of an issue.

Unfortunately, regardless of how good your dealer is to you, FCA calls the shots.

Oil related failures on the CTD’s are far and few between, but.....if FCA asks for documentation, and you can’t supply it, it’s ultimately FCA’s call.

 

[lpennock]

Unfortunately, regardless of how good your dealer is to you, FCA calls the shots.

Oil related failures on the CTD’s are far and few between, but.....if FCA asks for documentation, and you can’t supply it, it’s ultimately FCA’s call.

Agree. That is why I keep a log book of every thing (fuel, service, etc) that is done to the truck. It just happens to always have an entry at the 6 month interval.

 

[josephc1]

Oil and filter change every 6 months with 4k - 5k miles on the oil. I use Walmart Super Tech 15w40 HD diesel oil. At $9.00 a gallon the 6 mo 4 - 5K doesn't bother me much. Had Blackstone look at it a few times said it looked good, try another 5k and look again. Maxcare extended expires in May '21. Thinking of pushing the oil to 8k and having Blackstone give another look. Next change is due in December, might just skip that one and push it to 8K and see what it looks like. Won't matter if the oil has milage on it or not it will get changed at the very most once a year.

 

[JR]

I've been doing annual changes on my 14 since I got it along with an oil analysis - mostly for my own curiosity. My oil reports look as I would expect.

Annual mileage ranges between 12-15k a year. I've used Mobil Delvac 1300 and most recently the Delvac Extreme 15w40.

 

[EDankievitch]

The oil is not the issue. 15k miles is safe for a Mac run time on the oil. The issue requiring the 6 month change interval has to do with moisture and contamination. Low mileage engines have more of a chance of condensation not getting steamed out. Moisture and combustion blow by gives you a crosseve mixture that you don’t want laying in your nicely smooth polished bearings.

 

[SSchang]

Anybody know what Cummins changed on the engine to go from 6 mos 15,000 miles to 12 mos 15,000 miles on the current engines?

 

[Cliffman]

Anybody know what Cummins changed on the engine to go from 6 mos 15,000 miles to 12 mos 15,000 miles on the current engines?

What year did they make that change???

 

[Ozymandias]

Easy answer - as long as it is under warranty it's 6 month, afterwards it is by the miles.

 

[TFucili]

Anybody know what Cummins changed on the engine to go from 6 mos 15,000 miles to 12 mos 15,000 miles on the current engines?

The ink in the printer?

 

[JR]

Anybody know what Cummins changed on the engine to go from 6 mos 15,000 miles to 12 mos 15,000 miles on the current engines?

The fuel system is all new for the ISB but not in other platforms. Oil specs probably played a larger role than anything.

What year did they make that change???

2019.

 

[SSchang]

Don't know when they changed it. My 2015 was 6 mos 15,000 miles, my 2020 is 12 mos, 15,000 miles.

Scott

 

[HPSimpson]

I do what FCA said, because under warranty . After warranty then miles.

 

[Tuesdak]

I wonder if they have a 7th injector for DPF cleaning on the 2019+ or still use exhaust stroke injection? (Post-injection)

I can see exhaust stroke injection causing fuel dilution problems that may need the 6 month oil change. (Other OEM's like Ford had lots of problems with #2 diesel in the oil.)

Biodiesel is a wildcard as most oil analysis doesn't detect it as "fuel" contamination. It will show up as loss of viscosity. #2 diesel evaporates back out of the oil where biodiesel will not. Bio doesn't evaporate as well and some hits the cylinder wall during regen on the exhaust stroke injection event. It's on to the crankcase oil from there.

Running B99 we had a 2008 Duramax engine make oil and as I can serve as a bad example it was more than 2 quarts, low viscosity, and the truck was towing hard 550 miles a day to the SE corner of the state of AZ via Globe and Safford in 115+ weather. The extended regen times from bio didn't help the situation. UOA came back low viscosity, but, no fuel contamination. Generally on #2 diesel our oil had reached end of life going thicker viscosity from high heat and soot. There were no fuel leaks just a (now known) B99 issue on a DPF truck of it's era.

RTFM says: Don't run more than 5% BioDiesel... Why The Hell Not?! That would have been useful information. Nevermind the NOx going off the charts that should be voiding the emissions cert with Bio.

I do leave with this advice: worry more about the quality of the OIL FILTER and who actually makes the filter rather than the oil. In other words make sure the oil filter isn't made by The FRAM Group as an OCOD or a brand they make like K&N, Bosch, etc. Purolator is a brand known for media tearing after 3000 miles. Others have posted on the TDR filter specs to help us find the best filters out there.

 

[TFucili]

Still post-injection, from what I have read.