YotaAtieToo
Thick skull
180k
Every 5k miles, so fucking twice since I've owned it
Got it from a good buddy who got it at 10k miles, even went with him to pick it up. He had everything done at a dealer.
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6.7 Super Duty Maintenence/Mods
- Thread starter zxkevinxz
- Start date
Every 5k miles, so fucking twice since I've owned it
Got it from a good buddy who got it at 10k miles, even went with him to pick it up. He had everything done at a dealer.
Shit, well hoping for the best… but also for science interested in the autopsy180k
Every 5k miles, so fucking twice since I've owned it
Got it from a good buddy who got it at 10k miles, even went with him to pick it up. He had everything done at a dealer.
I run about 10k per change, and I use 15w-40 since there’s so much Bio around CA fuel stations.
YotaAtieToo
Thick skull
I run 15w40 as well, we use it in all out truck at work.
Maybe this is a case of "if you run 1 oil for a long time and switch, you'll blow the motor"
Tiha
Red Skull Member
Pretty sure that oil swap is a bunch of BS.I run 15w40 as well, we use it in all out truck at work.
Maybe this is a case of "if you run 1 oil for a long time and switch, you'll blow the motor"
We swap brands and weights all the time in our fleet. Cars, pickups, class 8 trucks.
Never once had a problem.
Have seen it, but that was swapping back and forth to synthetics back in the 80's
Levigarrett76
Zeus of the Sluice
Same here
TrailTamer
🤣🖕🏻
CarterKraft
Red Skull Member
It gets cold there, why the 15-40 over the 5-40?
TrailTamer
🤣🖕🏻
Or 10W-30
CarterKraft
Red Skull Member
They kind of require the 40w if BIO diesel is a factor, which is generally a factor at the pumps I visit.
YotaAtieToo
Thick skull
Tons of bearing material in the oil, she dun
Because they're all ran hard all the time. Ford specs 15w40 for "heavy use"
Definitely wasn't cold that day either.
ridered3
Low Talent Wheelin
Cummins swap
CarterKraft
Red Skull Member
Dang short blocks are $7k +
Levigarrett76
Zeus of the Sluice
Inframe it with cyl hone
YotaAtieToo
Thick skull
That's really the only thing I can justify.
Quick marketplace search found one for $4500 and one for $5k
I'm tempted to try and buy a whole wrecked truck though
Dafuq
Curious had you ever pulled samples or your previous owner buddy pulled samples?
What's the hypothesis on cause when presumably the thing lived a well maintained life?
YotaAtieToo
Thick skull
CarterKraft
Red Skull Member
Yeah lots of good shit in there.
I don't know the Daves dudes or the Lake Speed guy until very recently but the Lake Speed guy is very informative, stuff I had never considered...
Same here, I had heard of Dave dude but until last night hadn't seen any of his stuff. Watched one video from him and he referenced the Lake Speed guy so I watched that.
Wasn't there discussion in this thread about the last journal not getting lube for several seconds? That was really interesting... it made me question my 15w choice, even though I'm not in super cold climate.
I also am sold on snake oil now... I figure it can't hurt. I'm going to start throwing some HSS into my fuel. Also considering replacing my CCV and looking into an EGR cleaning. I've gone full tinfoil hat now from YotaAtieToo experience
CarterKraft
Red Skull Member
Same here, I had heard of Dave dude but until last night hadn't seen any of his stuff. Watched one video from him and he referenced the Lake Speed guy so I watched that.
Wasn't there discussion in this thread about the last journal not getting lube for several seconds? That was really interesting... it made me question my 15w choice, even though I'm not in super cold climate.
I also am sold on snake oil now... I figure it can't hurt. I'm going to start throwing some HSS into my fuel. Also considering replacing my CCV and looking into an EGR cleaning. I've gone full tinfoil hat now from YotaAtieToo experience
I don't fully understand the reason to go to 15w over 5w just for BioDiesel.
I don't need the extra MPG gained from running the 30 vs the 40w.
Severe service is for extended idle times, or towing a % of the time at max GVW.
The severe service oil is 5w-40 and that's what I run.
Snowy
Well-known member
That’s where I fall with my 6.7 too. 5w-40 Rotella and forget about it since that’s what Ford recommends and there aren’t many stories of 6.7 lube issues.
Cummins specs 10w-30 on the 6.7, 9L and 15L engines though. My previous company was a test fleet for Cummins/Valvoline on the CK-4 and AP-4 and 10w-30 CK-4 Valvoline is what goes in the cranks of all the Cummins trucks there.
Wulf
Well-known member
coming up on 5 years with my 6.7, 5w40 rotella. 5000-7500 oil change interval with fuel filters changed every time as well. have hucked loaded trailers over all of the mountain passes in CO and the truck seems to keep happy
Analysis I pulled the last oil change
I've only pulled two for this truck, but now I think I need to send in a baseline sample of unused oil for comparison. I'll also probably pull a sample around 3k on this current run just for shits and giggles.
I've only pulled two for this truck, but now I think I need to send in a baseline sample of unused oil for comparison. I'll also probably pull a sample around 3k on this current run just for shits and giggles.
CarterKraft
Red Skull Member
2.5% fuel dilution trending up from 2% is worry someAnalysis I pulled the last oil change
I've only pulled two for this truck, but now I think I need to send in a baseline sample of unused oil for comparison. I'll also probably pull a sample around 3k on this current run just for shits and giggles.
Edit; didn't read their comments but their sentiment is odd about the viscosity and fuel dilution. Lots of idling?
Other way, 2.5 trending down to 2.0
Yes, I do idle more than I should. I remote start every time before I get into the truck, and with my line of work I frequently find myself stuck on a call sitting in a parking lot or at a jobsite.
That's why I want to pull a sample here soon at 3k miles to see what the fuel dilution is at compared to the ~10k
CarterKraft
Red Skull Member
TrailTamer
🤣🖕🏻
I ran my old 12v Cummins on waste oil for a long time. Paid for itself many times over.
I can see why he claimed that the fuel is the enemy for oil… kinda.
I took the old 12v Cummins out for another 12v Cummins from a rusted out plow truck as a donor.
I took the old Cummins apart.
Everything inside looked perfect, literally like brand new other aside very minor wear on main and rod bearings. Cylinder walls, pistons and piston rings is another story. Trashed cylinder walls, tapered with big ridge at top. Pistons damaged or melted from rings carboned up & seized. One of piston’s ring 90% missing!
All things considered, 2 things I personally observed. 1) I never seen a diesel with sludges or oil varnish on inside, just the typical black oil easily wiped away and 2) diesels has a lot of oil “leaks” seeing how they have oil feeds to more things you’d see in a normal gasser. Piston squirters, turbo, injection pump. It’d take a lot of oil thinning or bearing clearance before oil pressure will begin to suffer.
I can see why he claimed that the fuel is the enemy for oil… kinda.
I took the old 12v Cummins out for another 12v Cummins from a rusted out plow truck as a donor.
I took the old Cummins apart.
Everything inside looked perfect, literally like brand new other aside very minor wear on main and rod bearings. Cylinder walls, pistons and piston rings is another story. Trashed cylinder walls, tapered with big ridge at top. Pistons damaged or melted from rings carboned up & seized. One of piston’s ring 90% missing!
All things considered, 2 things I personally observed. 1) I never seen a diesel with sludges or oil varnish on inside, just the typical black oil easily wiped away and 2) diesels has a lot of oil “leaks” seeing how they have oil feeds to more things you’d see in a normal gasser. Piston squirters, turbo, injection pump. It’d take a lot of oil thinning or bearing clearance before oil pressure will begin to suffer.