AGS info on my truck

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Joined
Jun 30, 2016
Posts
68
Reaction score
51
Ram Year
2016
Engine
5.7
Last year I took a trip out west and the oil temp never got below 225. Often it was between 230 to 335. Once it got to almost 250. I was not towing anything just cruising the interstates.
My gas mileage on my 5.7 was about 20-21 mpg.
This year I partially removed the grill shutters.
I had amazing results. Oil temperatures rarely got above 215, and very often it would be between 204 and 208. When outside temperatures got near 100, the water temperature did go up to about 212 and oil temp got to about 220. It never would get to 230 or 235 like last years trip. I would suspect putting a lower 180 degree thermostat in, the oil temperature would even go down with the water temperature. Just suspecting however.
Gas mileage averaged 24-26 mpg. Once I got 27 mpg.
I attached some pictures.
I want to mention, the driving was done on flat straight roads. I used cruise control and ECO was light was on. Aircondition on and at 71 mph cruise speed on all the time. I got a 5.7L and two wheel drive crew cab.
Also something else very interesting happened. I could actually see a drop in gas mileage from one type of road pavement surface materials to another. It would drop almost 1 mpg immediately when I drove from the typical concrete pavement surface to a very light pink color pavement surface road in South Dakota. The mpg would go up 1 mpg when I reentered the other concrete pavement surface. Must be more friction, I guess.
 

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Last edited:

John Schmidt

Member
Joined
Dec 20, 2020
Posts
76
Reaction score
152
Location
Snowbird - USA
Ram Year
2020
Engine
5.7L Hemi w/FLOWMASTER 50 SERIES DELTA FLOW
I removed all of the shutters except for the top, the bottom, and the center on my 2020 ram. The oil definitely stays cooler always hovering around 210°. The fuel efficiency has not changed at all. On my recent trip from Wisconsin to Florida I averaged 23 miles per gallon for the entire trip. I did use premium, as I always do, and I run red line oil. I am very happy with the modification. I was thinking about replacing my thermostat with a 195° rather than the 203°, but not sure if it’s worth it. I have seen some posts where people think the engine should not be too cool when running for efficiency reasons. Anybody have any thoughts on this? Thanks.
John
 

crazykid1994

Senior Member
Joined
Sep 21, 2013
Posts
5,040
Reaction score
4,963
Location
Florida
Ram Year
2017
Engine
Hemi 5.7
I removed all of the shutters except for the top, the bottom, and the center on my 2020 ram. The oil definitely stays cooler always hovering around 210°. The fuel efficiency has not changed at all. On my recent trip from Wisconsin to Florida I averaged 23 miles per gallon for the entire trip. I did use premium, as I always do, and I run red line oil. I am very happy with the modification. I was thinking about replacing my thermostat with a 195° rather than the 203°, but not sure if it’s worth it. I have seen some posts where people think the engine should not be too cool when running for efficiency reasons. Anybody have any thoughts on this? Thanks.
John
I run a 190 tstat as I didn’t want to go to cool. Warmer is better for fuel economy and emissions. Colder is better for performance. I can’t tell you to cold but to hot generally anything over 212 and you start cutting down life span and require new fluids sooner.


Last year I took a trip out west and the oil temp never got below 225. Often it was between 230 to 335. Once it got to almost 250. I was not towing anything just cruising the interstates.
My gas mileage on my 5.7 was about 20-21 mpg.
This year I partially removed the grill shutters.
I had amazing results. Oil temperatures rarely got above 215, and very often it would be between 204 and 208. When outside temperatures got near 100, the water temperature did go up to about 212 and oil temp got to about 220. It never would get to 230 or 235 like last years trip. I would suspect putting a lower 180 degree thermostat in, the oil temperature would even go down with the water temperature. Just suspecting however.
Gas mileage averaged 24-26 mpg. Once I got 27 mpg.
I attached some pictures.
I want to mention, the driving was done on flat straight roads. I used cruise control and ECO was light was on. Aircondition on and at 71 mph cruise speed on all the time. I got a 5.7L and two wheel drive crew cab.
Also something else very interesting happened. I could actually see a drop in gas mileage from one type of road pavement surface materials to another. It would drop almost 1 mpg immediately when I drove from the typical concrete pavement surface to a very light pink color pavement surface road in South Dakota. The mpg would go up 1 mpg when I reentered the other concrete pavement surface. Must be more friction, I guess.
Did you try hand calculating the gas mileage? 27 seems high and the computer is generally wrong. My dash used to make it to 22 average but hand calculated would range from 2-3mpg under the dash reading. 2wd definitely saves weight and rolling resistance though.
 
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