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MPG computer lies - badly!

Downytide

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FYI, the indicator on the cluster is based on a calculation that was pre-programmed, if the throttle is at this % and at this speed with this injector cycle it gives you an at the moment MPG readout, the problem is when they do an avg of the tank, they take all that input and took a mean.

I have this issue too with my Subaru, I often get 28-30mpg on the cluster, but reality is often 23-26mpg.
 

DraKhen99

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And so although they create a custom Monroney Sticker with all the options on a truck is it not false advertising to put 17/19/22 as the fuel economy the vehicle is rated for with said options? The sticker should reflect the options IMO. It’s kind of like them putting 22 mpg highway rating on a Rebel that will likely get 4 mpg less than the sticker indicates. I’m not oncerned with the fuel mileage one bit as my truck regularly gets 18-19 mpg which I think is fantastic for a large V8, but there’s definitely some deception going on.

Oh yeah, it's pure laziness on the part of the manufacturers. The EPA only has so many testing facilities and testers to go around, so they do about 15% of new vehicles each year, according to reports I've read.

I think it IS false advertising, but with the convoluted rules of the EPA, it's A-OK for manufacturers to do this. IIRC, it's a body style thing, so regular/extended/crew cab will each get a test, with whatever bed the MFG wants, and with each engine and 4x2/4x4. So, by my math, that's 18 trucks that need to be run through the test. Rebel would make it 19, if they did like Ford and certified it separately. If they tested the different RARs, they'd have 2-3x as many trucks to test.

I, like you, am not buying a truck to get hybrid fuel economy - it's a truck, I get that. What I DO value, however, is relative fuel economy. That's one reason I went with Ford in 2011 and 2015 - their fuel economy was way higher than GM's. The 2019 RAM 1500's fuel economy is close to what my 2015 F-150 3.5-liter EcoBoost was rated at, which made it somewhat appealing. I don't do "truck stuff" every day - I tow rarely and haul occasionally. What I value is commuting comfort and fuel economy with the ability to go do "truck stuff" in the evenings and weekends. My time is better spent with my wife and kids than standing in line to rent a truck to tow a trailer, haul a load to the dump, pick up bulky items, etc..

-John
 
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I have a 2012 Ram 3500 6.7. Last trip I made was 718 miles almost all highway towing a camper, mpg gauge read 14 mpg pretty much entire trip with four fuel stops. I noticed I was not getting near the distance per fill I would if I was getting 14, so I calculated it out on the fourth fill and found 10.3 mpg. Crazy amount of inaccuracy. Normally it stays within 1 mpg up or down not sure what got it this time.
 

Trooper4

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There are many theories on many forums about factory mileage figures. If you aren't in the engenders back pocket you'll never know how the arrive at them. All speculation. Here is another muze on the subject; a perfectly tuned vehicle, on an oval track with no wind, and under optimal temperature and humidity conditions.
And, unless you get the one in a hundred trucks that was made with perfectly in spec parts, and a motor that was manufactured with new dies on a in-spec boring mill, An electronics that were manufactured and assembled on the perfect day for the assembly lines, Your mileage is going to be less than optimal. In other words, your mileage will SUCK.
Welcome to the world of multinational, multipoint, assembly line automobile production. Ain't life fun?
 

Sal731

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I try not to get too worked up about it - what am I gonna do, stop driving my brand new truck?

I also try not to worry too much about what mileage other guys say they are getting...doesn't affect me.

I wish I got 30 MPG going 82 on the hwy. I think Tesla is coming out with an electric pickup truck soon, so maybe that's in the future.
I traded it my 2020 Silverado rst z71 duramax and over 27k miles I averaged 28.7 mpgs. 90+% highway. If your looking for those mpg’s go with a Chevy with the duramax. 95mph is still under 2k rpms. I will miss her for that reason. I only have 400 miles on my new rebel and once again mostly highway. Averaging 18 mpgs. I’m hoping this will improve. Driving between 65-75 mph. I know I won’t come close to the duramax but I love the rebel. Chevy drove more like a car compared to my rebel. If that’s what your looking for they are selling my trade in at Rockland motors. Lol. They gave me 51k for it and have it listed for 57. She’s a beauty. My rebel is a beauty and a beast. Good luck with the mpgs
 

JF19Longhorn

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I agree, it's off.. but every vehicle I've had since they started putting them in cars has been optimistic. This truck is usually 1/2 to 3/4 mpg optimistic. On a rare occasion it'll be dead on, but that's only happened a handful of times in the 24k miles I've driven this truck.
 

Trooper4

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I traded it my 2020 Silverado rst z71 duramax and over 27k miles I averaged 28.7 mpgs. 90+% highway. If your looking for those mpg’s go with a Chevy with the duramax. 95mph is still under 2k rpms. I will miss her for that reason. I only have 400 miles on my new rebel and once again mostly highway. Averaging 18 mpgs. I’m hoping this will improve. Driving between 65-75 mph. I know I won’t come close to the duramax but I love the rebel. Chevy drove more like a car compared to my rebel. If that’s what your looking for they are selling my trade in at Rockland motors. Lol. They gave me 51k for it and have it listed for 57. She’s a beauty. My rebel is a beauty and a beast. Goo

I traded it my 2020 Silverado rst z71 duramax and over 27k miles I averaged 28.7 mpgs. 90+% highway. If your looking for those mpg’s go with a Chevy with the duramax. 95mph is still under 2k rpms. I will miss her for that reason. I only have 400 miles on my new rebel and once again mostly highway. Averaging 18 mpgs. I’m hoping this will improve. Driving between 65-75 mph. I know I won’t come close to the duramax but I love the rebel. Chevy drove more like a car compared to my rebel. If that’s what your looking for they are selling my trade in at Rockland motors. Lol. They gave me 51k for it and have it listed for 57. She’s a beauty. My rebel is a beauty and a beast. Good luck with the mpgs
95mph and less than 2000rpm.
 

BowDown

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I just filled up today, used 23.4 gallons and went 417 miles, 80/20 city/hwy.
The trucks computer displayed 17.9
Hand calc gave me 17.82051282051282
 

Seabass4592

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Funny thing is….last year when gas was around $2 it wasn’t much of an issue! My have the last 6 months been pretty crappy! Elections matter!


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Sal731

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But let me specify again. The Silverado drove like a car compared to the rebel. Not sure if all the rams have the same feel but my ram feels like what I was looking for. Very trucky. When I’m driving to work and I get off the highway the roads in the Bronx are like off roading. The rebel is smooth as silk while the Silverado felt every bump. Besides the mpgs the rebel hands down is the better vehicle. Like I said though if flying on the highway is your thing check out the Chevy with the duramax option. You won’t be disappointed
 

Sal731

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That’s her. She was pretty. Not as pretty as my new rebel
 

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BowDown

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Funny how it didn’t have that effect the 4 years before, even with the economy growing at a record pace and more people than ever traveling! Energy independence matters!


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theblet

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Funny how it didn’t have that effect the 4 years before, even with the economy growing at a record pace and more people than ever traveling! Energy independence matters!


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It was nice while it lasted. Now everything’s going to $h!t. At least the lawsuit against drilling worked and we can produce in the gulf again.
 

afphinfan

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I have a new to me 2020 with a well broken in 75k miles on the 3.6l v6. I have not gone back to work on base so my primary driving is in town/country roads. My avg mpg usually varies quite a bit, i dont look at the fuel economy screen in the EVIC but when I reset my trip A it usually pretty close to my hand calculated mileage. My understanding with my previous Ram was that the average mpg readout is the last -200 miles or so where the trip is since you reset it. My tank is a 33 gallon and my range is approximately 705 upon fill up. I have never drained it so I have no idea what I can actually get on a tank but when I go back to commuting I will have more opportunity to see.
 

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