A new emissions truck is your next move?? LOL. Yes I change my oil every 12-15k miles which is probably every 2-3 months. And this was the very first time it was black immediately afterwards. Im getting oil changed tomorrow and im try full synthetic. I just changed my filter yesterday when I got home. gonna run it about 100 miles before I get my oil changed and check it.
Black fuel filter(pics included)
Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by nikmirbre, Aug 9, 2021.
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If you are getting black smoke out the stacks, your oil will soot up and turn black faster because of the unburnt fuel entering the crankcase.
ULSD is prone to having water in it. Can't remember it all, but many of solvents that used to be in diesel are gone and instead of water just passing with fuel in separates more easily and collects in tanks and fuel water separators. We started noticing it badly around 2010. We shock treat our bulk 12,000 gallon tank every quarter with Power Service tank cleaner Clear-Diesel Fuel & Tank Cleaner - Power Service , use power service biocide every half, and put Diesel Klean in every transport load. Has seemed to help .BoxCarKidd, Oxbow, jamespmack and 3 others Thank this. -
Just FYI, ive only ran about 600 miles since last week. I changed the fuel filter, didn't get around to changing the oil because its been raining. @spsauerland Im gonna take your advice and use that as soon as I get to running, which may not be until late next week or the week after. BTW, can you point me to an oil filter wrench for a 12.7?
Rideandrepair Thanks this. -
Seen tanks black as a barrel of oil. Injector orings seem to cause it more than fuel pump.
Since 1997 I have change 3 detroit fuel pumps. Not known for failure. One worn out, one external leak. And one on my own truck because I was doing a complete overhaul. But it is possible.
That's algae, alphaltine, or fuel lines coming apart.
If it was combustion you will see bubbles in fuel tank.BoxCarKidd, Swine hauler, Rideandrepair and 1 other person Thank this. -
I would also disassemble Davco and clean housing. Normally you have to order a lower oring ahead of time. That junk will hangout on the bottom if you drain it.
If you add biokleen. Carry spare filters with you for a few weeks.Swine hauler, Rideandrepair, nikmirbre and 1 other person Thank this. -
jamespmack and Rideandrepair Thank this.
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jamespmack Thanks this.
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That's a tough call, if it runs fine with no problems I'd keep watching it.
9/10 its going to be very obvious.
But changing orings is cheap and simple.Rideandrepair Thanks this. -
7 years on the fabric they claim. I just changed mine at 8 because I thought I found a small piece in filter. Better to be safe.nikmirbre and Rideandrepair Thank this.
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