6.7L Cummins Forum

I changed my oil at 3000 miles on the truck i know have 3800 miles on it and my system warnging came on and it said it needs a oil change whats up with that? I used shell 15w 40 oil that meets the cj4 spec do i need a oil change again? With only 800 miles on it?

Disregard the warning and go by your mileage. There's no sensors or tests being done to the oil. As a matter of fact my tech told me that he could program it for whatever mileage I wanted it set for.

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2007.5 Dodge Ram 3500 HD,QC, 6.7L Cummins, 6speed Auto, 4X4, Bighorn Edition.
Click for installs: Carr Steps PML Diff Cover Edge Juice with Attitude Volant Intake Hankook ATM RF10

Is there a reason for changing the oil in your diesel every 3000? Maybe heavy use, or environment conditions? Just wondering?

I've voiced my opinion about the oil change warning system before. Some people have called me an idiot but I have tested this thing pretty well over the three years that I have owned the truck. It should be noted that I drove it the first winter but have stored it each winter since. So, aside from that first winter all the driving has been summer with half or more of the KMs accumulated with our 8,000 # travel trailer on the hitch and 1,000# in the box. The truck now has 110,000+ KMs on the clock.
Because of our summer activities, much of the driving with the trailer involved many trips up and down the same roads. All city driving was done with the transmission set using only 1 to 4 gears and the truck is always driven with the engine brake on. Enough back ground.
There is no rhyme nor reason to when the oil change signal comes on. I have had it tell me to change the oil at intervals ranging anywhere from 800 KMs to 9,800 KMs. I finally learned to ignore it. I change the oil and filter, every 10,000 KMs, along with a chassis lube. Because of availability and price, I recently switched from Mobil Delvac 1 to Amsoil Premium CJ-4 and always use Fleetguard filters. The truck has never used oil nor does it "make" oil.
I hope this all helps.

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2007 Ram 2500 QC 4x4 SLT TRX4-Offroad 6.7L Automatic. '08 Jeep WK 3.0L diesel-wife's DD.
1998 Jeep ZJ 4.0L Automatic Selectrac-project for our son. '98 Jeep XJ-my wife's former DD.
1965 Dodge Polara 880 Convertible 383 Automatic.

Still get mine tested at each change, the latest sample reflected 1.5% fuel (YEA!!!) and the suggestion is to extend it out another 1,000 miles (currently at 5,000 mile changes) Iron and insolubles at 0.3% (soot and heavy crud) running Valvoline Super Blue 5w-40 synthetic and a fleetguard filter.

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07.5 3500 Quad, SRW, 4X4, Laramie, Leathered, Dark Metallic Gray, 6.7, 68RFE, 20K Reese, Ride Rite's, 2 Viair air compressors, Bully steps, Kleinn Locomotive air horns (5 in all), Billet polished locking fuel door, 'A' pillar mount Auto Meter Pryo, PML X-deep trans pan
06 Durango 285 RL 5'er Lifted by KZ

Where do you get the oil tested at? is there a kit that lets you do this yourself?

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2008 Dodge 2500 4x4 6.7L Quad Cab. K&N filter. H&S DPF delete (turbo back). EGR disconnected. Mini Maxx tuner (running on 120hp setting). B&W hideaway hitch.