• Welcome to EcoDieselRam.com We see you haven't REGISTERED yet.

    Your truck knowledge is missing!
    • Registration is FREE , all we need is your birthday and email. (We don't share ANY data with ANYONE)
    • We have tons of knowledge here for your EcoDiesel truck!
    • Post your own topics and reply to existing threads to help others out!
    • We believe in quality OVER quantity, and a family friendly place for your #EcoDiesel home!
    CLICK HERE TO REGISTER! Problems registering? Click here to contact us!

    Already registered, but need a PASSWORD RESET? CLICK HERE TO RESET YOUR PASSWORD!

VM Motori, oil, map, and GDE tune MPG

Tmckinney20

New Member
Supporting Member
Nov 17, 2022
4
1
Truck Year
2018
I was reading about the lubricity issues with our eco diesel and decided to contact VM Motori directly. We all see FCA cannot be trusted. After a substantial conversation with the VM Motori guys behind the scenes on several occasions, it has been brought to my attention FCA has told us to put the wrong oil in our motors. A few years ago, FCA said to change to 5W40 diesel… well we did, but the representatives in Italy at VM Motori said they use 5W40 and 5W60 European oil in their engines in Europe, NOT the American HD diesel oil. They said it is too thick, causing mechanical issues and a drop in the mpg because the engine had to work harder. We have all read the engine failures!!

Over the past year and 40K miles, since I bought my 2018 ED, here is what I have done and learned. Including changing from HD Diesel oil to European as VM Motori suggested.

I installed a GDE tune. Slight increase in throttle response and towing, which is an added improvement. MPG increased about 2-3 from 20-22 to 24-26mps. Nice added bonus.

Then I began cleaning the MAP sensor at each oil change (5K, not the suggested 10/12K like FCA said). The clean carbon-free map sensor provides a greater reading to the computer, which gave me an extra few mpgs. As you drive it will clearly and slowly begin to drop because of the carbon build-up around the sensor. It takes a T-40, about 5 minutes to remove, clean, and reinstall. With both of these changes, I now run the turnpike between 26-28mpg.

Now for the big improvement. I began using the 5W40 Synthetic European oil (MS-12991) as VM Motori representatives said. MS-12991 same number as FCA calls for, just not categorized as “HD” but used in small diesel applications all across Europe. I have changed it three times over the past 17K miles. Instantaneously BIG difference, guys! The engine warms up better and works less to become just as efficient as before. Oil pressure comes up faster, engine oil temp and pressures are the same and it still idles, runs, tows, and navigates highway speeds as expected. I run between 65-70 mph. The European oil has increased the mpg by 2. I now run the turnpikes between 29-31 mpg without question. I have calculated it manually and using the dash computer. These numbers do not lie. It is basically a straight and level 80-mile drive one way that gives a very sound estimate for my trials. I run it weekly.

Don’t take my word for it. Do as I did. Do your own research. Look at the makes and models of European cars that run the VM 3.0 and the fluids they use. Skip the FCA world, FCA many mastered the Cummings but not the ED. FCA seems to consistently trip over its own feet when they are not backpedaling to get out of trouble. Go to the manufacturer and read their engine history, specs, and current application for the little motor. I was impressed. I truly believe if we follow their guidelines, we will see many miles out of our trucks.

Mine is a 2018 ED Laramie 4WD stock wheels and tires.

Other than this rear headliner water leak issue, I really have enjoyed this truck.
 

Gtblakely

New Member
Feb 27, 2019
9
0
Truck Year
2016
where are you purchasing your oil?

Also is you headliner water problem from your third brake light?.....if so i solved that by using a windshield seal flowable silicone around the third brake light..stopped it good
 

Tmckinney20

New Member
Supporting Member
Nov 17, 2022
4
1
Truck Year
2018
where are you purchasing your oil?

Also is you headliner water problem from your third brake light?.....if so i solved that by using a windshield seal flowable silicone around the third brake light..stopped it good
I buy the oil from the local parts house. I use Valvoline 5w40 European Synthetic.

I replaced the third brake lamp assembly with an OEM Mopar lamp assembly. It did reduce the water flow, but not completely. I need to check the sunroof drains now. I was hoping to fix it without taking the headliner out. Still getting a damp liner after replacing the third lamp.
 
Last edited:

Gtblakely

New Member
Feb 27, 2019
9
0
Truck Year
2016
I buy the oil from the local parts house. I use Valvoline 5w40 European Synthetic.

I replaced the third brake lamp assembly with an OEM Mopar lamp assembly. It did reduce the water flow, but not completely. I need to check the sunroof drains now. I was hoping to fix it without taking the headliner out. Still getting a damp liner after replacing the third lamp.
my drains were also clogged and not hooked up right ( that one is on RAM!) after fixing that i still had dampness and like you I replaced the third brake light ( once again - so original plus two replacements) but this time I sealed it as i said earlier with a flowable silicone for windshield sealing and have had no more dampness or water intrusion into the cab.....knock on wood
 
Top