RAM 1500 Diesel Forum banner

41 - 46 of 46 Posts

·
Registered
Joined
·
169 Posts
I have a spreadsheet I prepared to calculate the different number of miles to break even on the cost of GDE vs. diesel saved and the 40K number is right in the middle. It also depends on how you drive your truck and where you drive it. In Oregon we have lots of hills. In the short time I've owned mine with GDE I've greatly appreciated the engine braking feature of the GDE. Haven't towed yet but sure I'll like that feature even better while towing. Captainmal speaks the truth about emissions and nasty dirty black oil. I'm no chemist but I'd bet nasty dirty black oil is NOT as good for any vehicle as golden brown oil.
 

·
Registered
Joined
·
122 Posts
That's why we call him the Captain! :cool:

You should also factor in the reduction in regens you get from GDE. This could have a long term positive effect on the truck.

I am only hypothesising, but during a regen, the truck throws more fuel, and obviously some of it doesn't get burned. Where does it go? Some into the dpf to create those 1300F temps, perhaps some unburned fuel may coat the cylinder walls, and end up in the oil creating possible fuel dilution. With stock tune, and some other tunes, they are known to regen just as frequently as stock. So IMO, there's the potential to get more fuel dilution if you have so many regen's during the life of an oil change.

I worked out the math, with stock tune, my truck was going into regen every 120-200 km, and I changed my oil every 10,000 km, so between that time, my truck would have had on the worst case, between 50-83 regens between oil changes. That's a hell of a lot of opportunity for a little unburned fuel to make it's way into the oil... I could be wrong, but look at all the bearing failures on these trucks. Is there the potential for fuel dilution? Maybe.

With GDE, I get a regen every 1100-1200 km, so with the life of my oil (again, 10,000 km), my truck would see maybe 9-10 regens per oil change. That's a huge improvement and the potential for fuel dilution decreases...

Not to mention, DPF's have a life span, so the more we plug them up, heat them up, regen, the less they'll last. They ain't cheap to replace, so less regen's is a good thing for the truck IMO.
 

·
Registered
Joined
·
461 Posts
I have a spreadsheet I prepared to calculate the different number of miles to break even on the cost of GDE vs. diesel saved and the 40K number is right in the middle. It also depends on how you drive your truck and where you drive it. In Oregon we have lots of hills. In the short time I've owned mine with GDE I've greatly appreciated the engine braking feature of the GDE. Haven't towed yet but sure I'll like that feature even better while towing. Captainmal speaks the truth about emissions and nasty dirty black oil. I'm no chemist but I'd bet nasty dirty black oil is NOT as good for any vehicle as golden brown oil.
Ditto. Lots of big hills in BC and love the engine braking. Towing or not it saves brakes. Brakes are still looking like new at 80k miles. So you are also saving your brakes.. That can be added to your spreadsheet aswell.
 

·
Registered
Joined
·
9 Posts
I had the unique opportunity to change oil in both my truck and my buddy's truck this weekend. Mine is a 2015 with 70K and the GDE tune. His is a 2017 with 20K and is bone stock. Both had 10K on the oil. I saved both oil filters to see if there was a visible difference. The filter on the bottom is from the 2017 without the GDE, the other is with GDE. We have a difference in the way we drive. I am 70/30 highway/city and he is the opposite. I don't know if that can account for the difference, but I don't think so. I lean towards to belief that the GDE mod is keeping the engine cleaner. Unless someone can explain the difference another way, I'm sold on GDE.

Filters.jpg
 

·
Registered
Joined
·
461 Posts
I had the unique opportunity to change oil in both my truck and my buddy's truck this weekend. Mine is a 2015 with 70K and the GDE tune. His is a 2017 with 20K and is bone stock. Both had 10K on the oil. I saved both oil filters to see if there was a visible difference. The filter on the bottom is from the 2017 without the GDE, the other is with GDE. We have a difference in the way we drive. I am 70/30 highway/city and he is the opposite. I don't know if that can account for the difference, but I don't think so. I lean towards to belief that the GDE mod is keeping the engine cleaner. Unless someone can explain the difference another way, I'm sold on GDE.

View attachment 81850
Zooming in on the bottom filter you can see how thick the filter media is because of all the soot packed on it. Wow.. Do we still need the question " GDE tune or not"?
 

·
Registered
Joined
·
3,854 Posts
I had the unique opportunity to change oil in both my truck and my buddy's truck this weekend. Mine is a 2015 with 70K and the GDE tune. His is a 2017 with 20K and is bone stock. Both had 10K on the oil. I saved both oil filters to see if there was a visible difference. The filter on the bottom is from the 2017 without the GDE, the other is with GDE. We have a difference in the way we drive. I am 70/30 highway/city and he is the opposite. I don't know if that can account for the difference, but I don't think so. I lean towards to belief that the GDE mod is keeping the engine cleaner. Unless someone can explain the difference another way, I'm sold on GDE.

View attachment 81850
Get a pic of both dispticks side by side at around 6k or 7k and you'll see just how much cleaner GDE keeps the oil. My oil looks clear and new up to around 7k before it darkens slightly.
 
41 - 46 of 46 Posts
Top