Since it was new I have faithfully changed the oil every 5000 kilometers. No fancy oils or additives just 11 liters of Finning Sure Lube and a new Fleetgard.
Filter =$8 (Cummins Power Boster Member )
Sure lube = $0 (donated )
Total = $8 x 3 times per year and my time

 

every 10 K max 7000 is the norm use delo 400 oil sample says 10k was still ok but i feel better doing it at 7K
250K +change and runs as good as new

 

How are y'all claiming to have semi-clean oil at changes? I run 3k mi changes and my oil is very, very sooty & black by the first fuel fillup ~300mi later. I ran my truck for 20 minutes after the cam swap and the stuff that was clear 20minutes before was now as dirty as the 3000mi used oil... I sent in a sample to be analysed over the last change. Just waiting on the results now and I'll let you know what type of particulate matter I'm seeing. I'm thinking the large injectors on a 177k stock bottom end have something to do with it.

branodn.

 

change mine at 4k. i think oil is cheap in comparison to an engine. bought my first car in 1957 have changed all the gassers i have owned at 2 to 3k. have only blown 2 engines in that time and both were on the dragstrip i was told years ago by an oil company person that should have known what he was talking about that if ones oil did not darken it was not doing its job.. filter is supposed to catch wear particals and oil keeps rest of "stuff" in suspension so it drains out when one changes oil. all but 2 of my cars have been bought used, and the engines have actually cleaned up.

 

every 7-10k.... depends on weather..... not a big fan of changing oil when there is snow on the ground......

 

I change the oil, oil filter, and fuel filter every 6-7k miles and run Rotella T and wix filters. 78k miles so far with no issues.

 

just got first change at 10k, with rotella 15w40

 

Every 5000 miles

Rotella 15W-40
Fleetguard filters

Thats bout it

TxDiesel007

 

Every 5K

Rotella T
Fleetgaurd filters all around

Dom

 

daily driver gasser = 3k
dodge CTD = 5-7k depending on use
wheeler = once a year

jiMMy

 

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Since the day it was new my oil would be black within 300 miles also?
I wonder if it has anything to do with the brand of oil or .......

 

when truck was new to me about 140,000 miles and stock oil stayed clean like on other diesel I have seen but have fixed that since adding a little fuel. change it about every 5-6 k .

 

Could be. I've only run Mobil1 Delovac 1300 and Chevron Delo 400 both in 15w40. Still no oil test results and I shipped Monday to the testing place 75 miles away. I'd like to think they're trying to figure out how I'm that hard on oil in only 3231 miles.

brandno.

 

Engine oil every 5,000 - 6,000 miles - 15W-40 Oil With fleetguard filter
Air Filter every 25,000 miles - Fleetguard
Fuel Filter every 15,000 miles - Fleetguard
Transmision every 60,000 miles - (coming soon)
Transfer case every 30,000 miles - ATF
Front / rear axles every 30,000 miles - 80w-90 gear lube

By the time it gets to these vavlues in mileage the oil's are getting dark or black. This also applies to Syn. Oils.

Syn Oil might have better quality of lube but it still gets dirty like dino juice.

Following this I had no problem really with my truck and my fuel milage hasn't changed much. It will vary from 20.1 to 21.1 MPG.

 

Every 3000 miles. Change at 9,100 with fuel filter right after I purchaed truck. Take it to the dealer and it gets delo 400.