VikingDiesel

so the Stea1ership tells me ever 3750 while cummins website says 15k(NO TOW) and 7500 (TOWING)

TexasCTD

Viking, You can do a search and get all kinds of oil threads and oil wars on here...ha ha.


I change mine every 5k. It's a nice round number, well within specs and not to burdensome at that interval...imo. Shell Rotella T 15w40 and a new fleetguard stratapore filter.

Don't go to the dealership and waste your money. You can buy 3 gallons of Rotella at Walmart or Autozone for about $24.00. Fleetguard Stratapore for about $10.00 from Cummins, any large diesel shop, or online/phone order from Geno's Garage.

Get you a 5 gallon bucket, change it yourself....and go drain it at Autozone in their recycle bin.

Totallyrad

My manual says 7500 towing and 15,000 non towing. I change it at 6000 just because.

MikeyB

6-7k miles for me using Delo 400 and Fleetguard filters.

MikeyB

clifford

heres one for you, I went to 2 dealers and asked for the auto trans 30K service oil change,filter and and adjustment the bands. They both said that that is not needed. I wrote Dodge and they say do what your dealer wants, so I guess the book we go by is no good.

TPilaske

I just did my first oil change w/ 7402 on the odometer. I'll stick w/ the 7500 mile oil changes. Should average about 2 times a year for me which will be nice. I used Chevron Delo 400. Bought a 6 gallon case at Sams Club for $48.


Tony

J BODY

Change it at 15 to 20k.

mattk50

every 7500 with delo 400 and fleetguard filters

Mopardan

I just tow occasionally, so I kinda split the difference, @ 10k miles. Delo 400 and Fleetguard filter.

mule3010

After oil analysis (Blackstone Labs) I will be changing every 15,000-16,000 mi. I do some towing and this is what was reccomended. Why everyone thinks they know what there engines needs better than the Cummins engineers I have no idea. This same engine in a Freightliner is only supposed to be changed every 20,00+ mi.(Ifigure this probably is genuine severe service) If you are changing on a 70's gasser schedule it's your money. I don't want to give Iran, the big oil co.s or anybody else my money unless I need to. You will get loads of opinions but I go with what the guys that built the engine reccomend backed up by oil analysis.
Joe

smokindog

Amen brother!

I'm still in disbelief that some folks change their oil so frequently. The best way to describe it is blind faith. It's no secret that Cummins and all the other manufacturers have tested various oils and extended change intervals for decades so why anyone would want to throw scientific facts to the curb and spend more money is beyond me.

So your oil is black instead of brown, who cares as long as the lubricating properties are up to spec?

staarma

I change mine every 5k because I don't put a lot of miles on. I do a lot of stop and go during the winter with some idling so I'm sure I get some cylinder wash down which isn't good at all. I do tow during snowmobiling season, hunting and camping but otherwise it's a daily driver for me and work is about a 5 mintue drive if I lolly gag. I use Fleetguard Stratopore filters with Rotella T 15-40 and I change the fuel filter each time I change the oil as well.

TonyB

I plan on Chevron Delo 400, every 7500. I will be towing quite a bit on the spring and fall (fishing) and will be backing up with UOA. If several UOA comes back reccemnding longer interval, I'll seriously consider it.

Likewise, I don't understand why people succumb to advertising...then again, maybe I do....the general public does not want the think!

Tony

SmokinDodge12V

Oil and filter every 5k and fuel filter every 15k.

8mpg

I change my oil every 3000 miles...BUT I have a lifetime unlimited mile warranty, oil changes at 3000 miles for $550. I figure at 36,000 miles I have gotten my money's worth and I have nice fresh oil regaurdless of it being needed or not.