Oil level over full mark
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Freshman User
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Oil level over full mark
2018 F250 CC SB 6.7 ... I checked my oil and noticed it was about 1/8" over the full mark. It was always on the full mark when I previously checked it about 3000 miles ago. Truck has 5800 miles on it with 150 engine hours and 20 idle hours. Coolent reservoir is on max line. I'm thinking diesel in the oil?? Hasn't had an oil change yet. Should I change oil even though the intelligent system hasn't told me too? Am I over thinking this? Thanks
Fleet Mechanic
Joined: Jan 2015
Posts: 1,377
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From: SE Michigan
2018 F250 CC SB 6.7 ... I checked my oil and noticed it was about 1/8" over the full mark. It was always on the full mark when I previously checked it about 3000 miles ago. Truck has 5800 miles on it with 150 engine hours and 20 idle hours. Coolent reservoir is on max line. I'm thinking diesel in the oil?? Hasn't had an oil change yet. Should I change oil even though the intelligent system hasn't told me too? Am I over thinking this? Thanks
Postmaster
Joined: Jan 2005
Posts: 4,424
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From: BC Canada
It really depends on how long you leave it to settle and stabilize after running. 15 minutes or a full fuel tank on level ground would be full, another 20minutes, slightly over. How long has it sat when you get this reading? I wouldn’t be worried if it had been running, fully warmed up, and only say level once checked after a full hour and it was an 1/8 over. If however it’s under Over that much after only 10 minutes, your overfilled and a change is probably Warrented. I have check after running right away it’s half way up, but when it sits for an hour, it’s full, if not a bit over. For some reason, they seem to be adding a bit to much when changing the oil at the dealer.
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Freshman User
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It really depends on how long you leave it to settle and stabilize after running. 15 minutes or a full fuel tank on level ground would be full, another 20minutes, slightly over. How long has it sat when you get this reading? I wouldn’t be worried if it had been running, fully warmed up, and only say level once checked after a full hour and it was an 1/8 over. If however it’s under Over that much after only 10 minutes, your overfilled and a change is probably Warrented. I have check after running right away it’s half way up, but when it sits for an hour, it’s full, if not a bit over. For some reason, they seem to be adding a bit to much when changing the oil at the dealer.
Elder User
Joined: Mar 2017
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It's important to make all inputs (temps, time, etc) as consistent as possible to take a reading and then concern yourself with this topic.
It is possible that fuel dilution is happening; diesel fuel getting into the crankcase due to regens or leaking injector.
But the only way to know is to be very diligent and track it over the whole OCI.
Also take a sample and send out for analysis; that gives quick confirmation.
It is possible that fuel dilution is happening; diesel fuel getting into the crankcase due to regens or leaking injector.
But the only way to know is to be very diligent and track it over the whole OCI.
Also take a sample and send out for analysis; that gives quick confirmation.
Posting Guru
Joined: Nov 2002
Posts: 1,222
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From: Texas
If you always check it in the same parked location, after the same time to drain down--even 1/8" isn't enough to worry about, especially with the design of the cable/tool and length. Being on the first oil change, I'd just keep monitoring it.
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Fleet Mechanic
Joined: May 2011
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From: Rainier OR
I agree that where you park is really important. Just a little difference in level makes a difference on the dipstick.
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Elder User
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I find that hard to believe, from a technical point of view.
There are only a couple trustworthy ways to measure fuel content in lube; they are all done in a lab under controlled conditions.
I suspect this Forscan tool is simply using an algorithm to estimate a %; based on pre-programmed outputs relative to conditional inputs.
Not at all accurate IMO.
Fleet Mechanic
Joined: Jan 2005
Posts: 1,784
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From: Tomball, Tx
Interesting ...
I find that hard to believe, from a technical point of view.
There are only a couple trustworthy ways to measure fuel content in lube; they are all done in a lab under controlled conditions.
I suspect this Forscan tool is simply using an algorithm to estimate a %; based on pre-programmed outputs relative to conditional inputs.
Not at all accurate IMO.
I find that hard to believe, from a technical point of view.
There are only a couple trustworthy ways to measure fuel content in lube; they are all done in a lab under controlled conditions.
I suspect this Forscan tool is simply using an algorithm to estimate a %; based on pre-programmed outputs relative to conditional inputs.
Not at all accurate IMO.
probably same way ford is calculating % of oil life....sensors, driving conditions, load, math etc
I suppose you could do us the favor and track your oil w/ forscan and sample it - and compare the data you collect.
Hotshot
Joined: Apr 2013
Posts: 10,121
Likes: 652
From: NH
Interesting ...
I find that hard to believe, from a technical point of view.
There are only a couple trustworthy ways to measure fuel content in lube; they are all done in a lab under controlled conditions.
I suspect this Forscan tool is simply using an algorithm to estimate a %; based on pre-programmed outputs relative to conditional inputs.
Not at all accurate IMO.
I find that hard to believe, from a technical point of view.
There are only a couple trustworthy ways to measure fuel content in lube; they are all done in a lab under controlled conditions.
I suspect this Forscan tool is simply using an algorithm to estimate a %; based on pre-programmed outputs relative to conditional inputs.
Not at all accurate IMO.
Fleet Mechanic
Joined: Feb 2018
Posts: 1,592
Likes: 204
You are correct. The engine cannot scientifically determine how much fuel is in the oil. It simply calculates how much it "thinks" might be in the fuel based upon engine RPM, regeneration time, etc, etc. It is probably somewhat accurate since Ford took the time to create this PID...
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