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Old 08-31-2018, 10:20 AM   #41
RLM5150
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Not accurate unless you calculate by hand. My RAM is notorious for over estimating my mileage.
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Old 08-31-2018, 12:54 PM   #42
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Those 18 wheelers must be getting 60 - 70 MPG then!
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Old 08-31-2018, 04:25 PM   #43
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DON"T rely on the gauges to tell you you're fuel mileage!

Fill tank. - Write down mileage from odometer. - Drive truck. - Fill tank again. - Write down mileage from odometer. Divide total miles driven by amount of gas for 2nd fill-up.
That's your mileage - Miles/Gallon.
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Old 08-31-2018, 04:29 PM   #44
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Did you notice "25.6" doesn't say MPG after it? I think it's kilometers per 100 liter.
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Old 08-31-2018, 04:45 PM   #45
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Did you notice "25.6" doesn't say MPG after it? I think it's kilometers per 100 liter.
It says right next to the number that it's l/100km.
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Old 08-31-2018, 05:56 PM   #46
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It says right next to the number that it's l/100km.
Yup...sure enough. Look hard enough and the MPG is not there and it shows l/100km above where it used to say MPG in the first pic.
Starting to think the OP is trying to have a little fun with us all
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Old 09-01-2018, 05:40 AM   #47
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Yup...sure enough. Look hard enough and the MPG is not there and it shows l/100km above where it used to say MPG in the first pic.
Starting to think the OP is trying to have a little fun with us all
Well I was having fun, yes, but just trying to figure this out...and did...because I knew this was not possible - as I took off down he road yesterday for second time w trailer in about 3 weeks, and was now getting 35+mpg. LOL...this cannot be.

I've had this truck for 6 years now and have messed with the digital info gauge countless times and can say I never reset mpg to kpg...which is exactly what happened...and I did it just after hooking up my first 7400lb trailer. LOL. What timing.

It's hard to see the little legend on the gauge when looking out a bright windshield and it never occurred to me that it changed for any reason because my mind is on the trailer. Don't know how it changed but I must have pushed something.

Anyways, I know you were all hoping I stumbled across a new law of physics but did not. I stumble across and old law of physics. LOL

Thanks everyone for all your help.
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Old 09-01-2018, 06:43 PM   #48
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You want fun, the fords trucks that have language advice on the dash, switch it to french. Unsure how many trucks have that option. The 2008 f250s work trucks had that. I switched several guys trucks language from english to one of the two other choices and one guy took in for service. I guess he could not read the manual first.
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Old 09-02-2018, 03:23 AM   #49
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Anybody know why Canadian vehicles aren't reading out kilometers per liter? Generally fuel is sold by liters and distance is in kilometers.
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Old 09-02-2018, 03:54 AM   #50
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Anybody know why Canadian vehicles aren't reading out kilometers per liter? Generally fuel is sold by liters and distance is in kilometers.
Which ones are you speaking of? Any that I have been in are switchable to either measure.
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Old 09-02-2018, 04:23 AM   #51
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Anybody know why Canadian vehicles aren't reading out kilometers per liter? Generally fuel is sold by liters and distance is in kilometers.
Agree Jim. Never understood that "so many ltrs per 100 kms" thing. I have always switched to MPGs. Old school. Don't get me started on the metric system. Legacy from our esteemed Prime Minister Pierre Trudeau back in the 70s. Oh did I mention everything in Canada has to be in French/English since that era also.
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Old 09-02-2018, 04:33 AM   #52
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Agree Jim. Never understood that "so many ltrs per 100 kms" thing. I have always switched to MPGs. Old school. Don't get me started on the metric system. Legacy from our esteemed Prime Minister Pierre Trudeau back in the 70s. Oh did I mention everything in Canada has to be in French/English since that era also.
I wish it was only 2 languages. Every time I get a letter from my health insurance company, which is at least once a week, there are a min of 3 pages. Page 1 is the info they want to convey and the following 2 pages are the list of languages that the first page is available in. Talk about killing trees and polluting!
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Old 09-02-2018, 06:51 AM   #53
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Agree Jim. Never understood that "so many ltrs per 100 kms" thing. I have always switched to MPGs. Old school. Don't get me started on the metric system. Legacy from our esteemed Prime Minister Pierre Trudeau back in the 70s. Oh did I mention everything in Canada has to be in French/English since that era also.
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I wish it was only 2 languages. Every time I get a letter from my health insurance company, which is at least once a week, there are a min of 3 pages. Page 1 is the info they want to convey and the following 2 pages are the list of languages that the first page is available in. Talk about killing trees and polluting!
To add "insult to injury" every (and I do mean every) stack of heavy items in all big box stores seem to always be stacked so the "alternative language" is visible (thanks Murphy). The only way to find out what's in the boxes is to "unstack and turn one of the boxes" so that English is visible.....
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Old 09-02-2018, 01:29 PM   #54
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To add "insult to injury" every (and I do mean every) stack of heavy items in all big box stores seem to always be stacked so the "alternative language" is visible (thanks Murphy). The only way to find out what's in the boxes is to "unstack and turn one of the boxes" so that English is visible.....
I experienced this as well.I just assume the person doing the stacking can't read so it makes no difference to them.
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Old 09-05-2018, 08:29 AM   #55
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I have a Dodge Ram with a 5.7 and I typically get 9 mpg towing my trailer, 10 to 11 at 55 with a tail wind. None of the listed "possible reasons" would increase your gas mileage, unless your trip is all downhill.
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Old 09-05-2018, 09:38 AM   #56
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Your dash readout for fuel consumption is gallons per mile, not miles per gallon. You don't get better gas mileage by pulling a trailer unless you're uncle Jed
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Old 02-05-2019, 11:35 AM   #57
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My everyday non-towing gas milage in my 2012 Toyota 4WD Tundra with 5.7 engine is around 14.5 according to the built in gauge.

And then we bought our first trailer just a few weeks ago.

Soooo...before I left home to pic up our 7400lbs trailer in WI and tow it back to IL – that's about a 2+ hour drive – I reset my gauge before the drive up to make sure my normal 14.5 to 15 mpg was "true".

Once there I got all hooked up ready to leave and resent my gauge for the trip down, fully expecting about 9 mpg from what I've been reading, but to my surprise my gauge was reading between 26 mpg and 28.5 mpg.

Yes, 26 mpg and 28.5 mpg. Something must be wrong, right?

In total the trip up and down took a bit less then a 1/2 tank...that in total is about a 4.5 hour drive, with a 7400 lb trailer for half that drive. That's not too bad at all...right?

Soooo...once home I parked the trailer and continued driving normally for the rest of the week, until it was time fill up. I took a look at the gauge before fill up, that as now reading about 22, which would seem right on average if I drove off the other half of the tank without a trailer.

I filled the tank and reset the gauge, to find I'm getting my normal 14-15 mpg again, that means the gauge is working fine.

So a few theories:

1. We were heading "south" on the way back with the trailer - and that's downhill...???

2. My trailer was so heavy, that my front wheels where barely touching the ground, and my gauge gets it's reading from front wheel tire rotation....???

3. Northern winds push me along? But this was mostly back roads driving for the most part, through small towns...with some hi speed 60-65 mph driving as we got on route 12 near the border.

That's the best I can come up with.

Anyone want to take a stab at this?

Add another 2000lbs in your bed and try for 30mpg
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