Oil change without flash

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Nutt

Member
Feb 20, 2015
65
17
8
Arkansas
Truck Year
2014
I have a 2014 ecodiesel its about time for the oil change I'm going to use the rottella this time do I need to have the truck flashed to do this? Talked to 3 dealers today 2 haven't heard anything about the oil grade change the other has and said yes the truck needs a flash. My question is does it really need the flash for the oil or is it just a generic answer from a dealer and the flash for other issues ? I've read on some other post that it changes shift points and decreases fuel economy not something I really want.


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Reimaster

New Member
Dec 26, 2016
17
11
3
Truck Year
2016
When we took our 2016 Ecodiesel in for it's first oil change, there were about 7 or 8 flashes required and applied. My gut feeling is that these are factory required modifications to the ignition, the pollution controls and other computer driven components. I will probably have the dealer do my oil changes until the warranty expires or I notice that the number of flashes has dropped to zero. I have not really noticed a decline in my mileage since then but time will tell. I drove to Bakersfield just before the first oil change which is a 200 mile round trip from where we live in Van Nuys, California. We averaged over 28 mpg and will have to make this trip again real soon. I'll recheck the mileage then and see if there was any change. However, the dealer informed me that these engines are not broken in until around 50,000 miles, so what ever my current mileage is, it should continue to slightly improve over time. We currently have just under 8700 miles on the truck.
 

Nutt

Member
Feb 20, 2015
65
17
8
Arkansas
Truck Year
2014
Wish mine got that kind of mileage. The best I can remember is around 26 when it had around 10-15000. I'm at 60,000 now and has went to around 23 mpg. This truck has a long history of codes and problems. I think my truck was put out as a "let's see what sucker buys this for a beta tester" truck. I literally have a 3 ring binder in the truck of service write ups from codes to an oil leak, to coolant blow out due to a spreader on a clamp not being pulled off during assembly ( took them two weeks to find that problem). I'm not telling you this to scare the crap out of you just to let you know what some of us 1st year model suckers have been through. Not two mention after I bought the truck the stealerships certified mechanic for this truck model quit and I had to take it 2 hours away for work. This being said I have a friend with a 2015, around 50,000 miles and 0 problems.


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flying7

Active Member
Jul 15, 2014
175
42
28
CALI
Truck Year
2014
the tsb shows the flash is for the oil life interval changes. I would say it s probably not a "have to have" update but that's just me!!
 

Nutt

Member
Feb 20, 2015
65
17
8
Arkansas
Truck Year
2014
the tsb shows the flash is for the oil life interval changes. I would say it s probably not a "have to have" update but that's just me!!
Wouldn't happen to know if it just changes the mileage between oil changes or is it more technical than that, if that's all it is I can deal with that.


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Reimaster

New Member
Dec 26, 2016
17
11
3
Truck Year
2016
Is there any website where we can go to to find out what the flash codes mean and what they're for?
 

murrrphh

Member
Sep 7, 2016
39
19
8
Truck Year
2014
I have a 2014 ecodiesel its about time for the oil change I'm going to use the rottella this time do I need to have the truck flashed to do this? Talked to 3 dealers today 2 haven't heard anything about the oil grade change the other has and said yes the truck needs a flash. My question is does it really need the flash for the oil or is it just a generic answer from a dealer and the flash for other issues ? I've read on some other post that it changes shift points and decreases fuel economy not something I really want.


Sent from my iPhone using Tapatalk
I never got the truck flashed and switched to Rotella. No problems, no codes. I don't use the oil life indicator anyway, just off mileage
 

Brokedownbutgood

Active Member
Apr 17, 2016
289
103
28
Truck Year
2015
The updates include changes to your tcm, shifting patterns and rpm. Also changes the oil algorithm for oil life. My best guess is because T6 drops viscosity faster than most other 5W-40 oils. But regardless your engine well be fine changing oil viscosity to then updated spec without any updates or flash.
 
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Capsfloyd

New Member
Apr 30, 2017
7
2
3
Truck Year
2015
2015 took mine in ask the service advisor. She looked it up and said on my 15, no flash needed i was up todate
 

Brady

Well-Known Member
Jun 7, 2015
1,041
414
83
OHIO
Truck Year
2015
2015 took mine in ask the service advisor. She looked it up and said on my 15, no flash needed i was up todate
Yep, same here. 2015 just switch oil weight, nothing else to do.

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