black engine oil
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4th Gear
Joined: Jan 2023
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black engine oil
ok sorry for posting another oil question,i have a new to me 2019 f350 6.7 with 120km,my previous truck was a 2006 gmc drw 6.6 lbz,now from the time i owned the truck to 300km i used t6 rotella,every 5000km oil changes,my oil took about 1500km before it started to turn black but never turned black like my ford,i was a heavy equi.mecanic for over 30 years so black engine oil was common,now after my 1 oil change the oil was black pretty much right away,my 2 oil change is still pretty much clean after 300km, my exhaust pipe is clean ,the truck is going throught def,why,i know the truck was properly serviced as i have the records,it had oil changes at around 8,000 km since new
Logistics Pro
Joined: Sep 2002
Posts: 4,414
Likes: 1,017
From: Central KY
Yeah, mine runs dirty too. Oil gets pitch black in no time. Haven't seen that on my prior diesels either.
I was watching an interesting video last night. Oil engineer was talking about the piston rings and how the slightest end to end gap in the ring allows soot to bypass, which makes the valves and engine oil get dirty faster. When he rebuilds them, he recommends a supplemental ring to be installed on the second main ring so that soot can't get past the piston.
He also was talking about how manufacturers get credit from the EPA when they specify a long oil change interval (10,000 miles or more). I already knew that oil viscosity spec had everything to do with the EPA certification, but I never thought that the interval also did. Interesting....
And apparently Rotella is not the best oil you can use in the Powerstroke. So I'll probably go back to Motorcraft.
I was watching an interesting video last night. Oil engineer was talking about the piston rings and how the slightest end to end gap in the ring allows soot to bypass, which makes the valves and engine oil get dirty faster. When he rebuilds them, he recommends a supplemental ring to be installed on the second main ring so that soot can't get past the piston.
He also was talking about how manufacturers get credit from the EPA when they specify a long oil change interval (10,000 miles or more). I already knew that oil viscosity spec had everything to do with the EPA certification, but I never thought that the interval also did. Interesting....
And apparently Rotella is not the best oil you can use in the Powerstroke. So I'll probably go back to Motorcraft.
Cargo Master
Joined: Jul 2011
Posts: 2,677
Likes: 981
From: Walpole, MA
ok sorry for posting another oil question,i have a new to me 2019 f350 6.7 with 120km,my previous truck was a 2006 gmc drw 6.6 lbz,now from the time i owned the truck to 300km i used t6 rotella,every 5000km oil changes,my oil took about 1500km before it started to turn black but never turned black like my ford,i was a heavy equi.mecanic for over 30 years so black engine oil was common,now after my 1 oil change the oil was black pretty much right away,my 2 oil change is still pretty much clean after 300km, my exhaust pipe is clean ,the truck is going throught def,why,i know the truck was properly serviced as i have the records,it had oil changes at around 8,000 km since new
Logistics Pro
Joined: Sep 2002
Posts: 4,414
Likes: 1,017
From: Central KY
That could be. When I drain mine I let it stay cracked open to drain for 15 minutes or so. But even then if I put 12 quarts back in the level will reach the top of the "bulb" on the dipstick.
Lead Driver
Joined: Nov 2005
Posts: 5,247
Likes: 4,267
From: Kaysville Utah
Back in 2012, I was in the middle of nowhere and my 2011 truck needed an oil change. Dealer said it was two weeks to get me in for an oil change. So took it over to Walmart. Bought the oil and let the service guys change it.
When they were done. They pulled the truck out of the bay and gave me a bill. I asked for the left over oil, They said there was none,. I showed them on the owners manual that if they had put all the oil in, They had put 2 quarts too much. So they pulled it back and drained it and put the right amount of oil in. Since they screwed up the first oil change, they let me watch the second. My truck had been started pulled out and parked and pulled back in. Oil was BLACK. It take no miles to turn new oil black. I do believe there is a lot of left over oil sitting in various pockets on this engine.
When they were done. They pulled the truck out of the bay and gave me a bill. I asked for the left over oil, They said there was none,. I showed them on the owners manual that if they had put all the oil in, They had put 2 quarts too much. So they pulled it back and drained it and put the right amount of oil in. Since they screwed up the first oil change, they let me watch the second. My truck had been started pulled out and parked and pulled back in. Oil was BLACK. It take no miles to turn new oil black. I do believe there is a lot of left over oil sitting in various pockets on this engine.
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Lead Driver
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It's the extra oil doing it. The pan is designed with oil passages from the pump to the block to the cooler, etc. and that alone can hold a quart or more. There are also one way check valves to prevent oil drainback when not running to protect the valve train. I wouldnt say the EGR causes it though, I had a deleted 2012 that was just as dirty after an oil change as my 2019 is.
Watch this tear down and look at how the pan is cast.
Watch this tear down and look at how the pan is cast.
FTE Legend
Joined: Mar 2017
Posts: 31,969
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From: Western NY
I find it interesting that the one guy on You Tube, Dave Smith, came up with his oil check valve in the oil flow circuit because he believes there's a problem. If at least 4 quarts of oil is staying in the block when the oil is changed, where's the problem then? I remember thinking this when Fritz I believe posted his video. Troy has about 300k miles on his 6.7, wouldn't have something gone out if that was that big a problem. What do you guys think?
Lead Driver
Joined: Feb 2022
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I believe most engines have a drain back check valve to prevent oil from leaving things like lifters, cams and such and prevent dry starts. Some are in the heads, some are in the blocks, some don't have any at all.
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