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Re: Need Real world MPG's...thanks! [Re: Chris B] #12575264 01/12/18 03:47 PM
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Originally Posted By: Chris B
Originally Posted By: James P.
I have a 2017 ram 4x4 11000 miles so far. Havent got over 15mpg yet, just got back from falcon pulling my buddies z21 average mpg 6.7 . I get 7.2 pulling my basscat cougar. Filled up 4 times in 500 miles . Thinking of trading it in for a Diesel my 15 ram got about the same. I do pull 70-75 mph


Thank you for your honesty.


If people would post a video including what they are towing and where then point the camera at the instrument cluster for the rest of the drive I think it would be very enlightening. Driving habits are a huge part of fuel economy. Ive never done over 5000 rpm in any vehicle I have owned. I know several people who see 5k several times a day. Naturally I get much better fuel mileage, my tires, transmission, and in general vehicle lasts longer too.

Re: Need Real world MPG's...thanks! [Re: d] #12575456 01/12/18 05:22 PM
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James P. Offline
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I took a picture of my instrument cluster but wont let me post it .

Re: Need Real world MPG's...thanks! [Re: d] #12575476 01/12/18 05:35 PM
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Picture would do no good, it is static, video would show how your driving it. You ever look where the tach is when the transmission shifts? My guess is yours is quite high.

Re: Need Real world MPG's...thanks! [Re: James P.] #12575479 01/12/18 05:36 PM
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Originally Posted By: James P.
I took a picture of my instrument cluster but wont let me post it .


If you took the picture with your phone then screen shot the picture and retry. For whatever reason iphones save pictures as a file format other than jpeg, but the screen shots are in a format that can be posted.

Re: Need Real world MPG's...thanks! [Re: d] #12575503 01/12/18 05:50 PM
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I stated earlier I do not drive fast with or without a trailer. I just use reg unleaded from where I find it cheapest.

Re: Need Real world MPG's...thanks! [Re: James P.] #12575574 01/12/18 06:34 PM
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Originally Posted By: James P.
I have a 2017 ram 4x4 11000 miles so far. Havent got over 15mpg yet, just got back from falcon pulling my buddies z21 average mpg 6.7 . I get 7.2 pulling my basscat cougar. Filled up 4 times in 500 miles . Thinking of trading it in for a Diesel my 15 ram got about the same. I do pull 70-75 mph
10k on Tundra. I get 9-10 pulling boat on hwy and my boat is bigger and heavier with more wind resistance. Empty in get right around 17 may be little higher depending on speed with warmer temps and summer blend. Right now I am getting low 16s running 70-75. Since I have been back in a full size V8 I have found that they really suck the gas when sitting still and accelerating.


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Re: Need Real world MPG's...thanks! [Re: d] #12576184 01/13/18 02:39 AM
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I dont floor my truck or drive it hard. My tach is normally hitting around 3500 to 4000 when Im getting on Hwy. Think its 2000 rpms at 70mph give or take a 100rpms.

Last edited by James P.; 01/14/18 01:56 PM.
Re: Need Real world MPG's...thanks! [Re: d] #12582054 01/17/18 02:22 AM
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I'm sure you have the towing rear end. It's just nearly impossible to get good mpg when you're reducing speed that much before the wheels. Even with the 8-speed transmission, your top gear just isn't that good.

I have 3.55 in mine and with the tune, I'm now easily getting over 30 mpg on highway trips. Redchevy is the same way. Lenahorse has the 3.21 with his Hemi and is getting mid-20s. None of us can tow as much or as easily as you can though.


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Re: Need Real world MPG's...thanks! [Re: Stump jumper] #12582070 01/17/18 02:30 AM
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Originally Posted By: Stump jumper
Originally Posted By: James P.
I have a 2017 ram 4x4 11000 miles so far. Havent got over 15mpg yet, just got back from falcon pulling my buddies z21 average mpg 6.7 . I get 7.2 pulling my basscat cougar. Filled up 4 times in 500 miles . Thinking of trading it in for a Diesel my 15 ram got about the same. I do pull 70-75 mph
10k on Tundra. I get 9-10 pulling boat on hwy and my boat is bigger and heavier with more wind resistance. Empty in get right around 17 may be little higher depending on speed with warmer temps and summer blend. Right now I am getting low 16s running 70-75. Since I have been back in a full size V8 I have found that they really suck the gas when sitting still and accelerating.
I must have different gears in my Tundra. It's a 2015 4x4 crew max with the 5.7. It averages right at 12.9-13 normal driving at legal posted speeds. Gets around 10.9-11 towing a 19ft Skeeter at legal speeds. Never, ever gets better than 14-15 mpg.


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Re: Need Real world MPG's...thanks! [Re: SteezMacQueen] #12582313 01/17/18 11:48 AM
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Originally Posted By: SteezMacQueen
Originally Posted By: Stump jumper
Originally Posted By: James P.
I have a 2017 ram 4x4 11000 miles so far. Havent got over 15mpg yet, just got back from falcon pulling my buddies z21 average mpg 6.7 . I get 7.2 pulling my basscat cougar. Filled up 4 times in 500 miles . Thinking of trading it in for a Diesel my 15 ram got about the same. I do pull 70-75 mph
10k on Tundra. I get 9-10 pulling boat on hwy and my boat is bigger and heavier with more wind resistance. Empty in get right around 17 may be little higher depending on speed with warmer temps and summer blend. Right now I am getting low 16s running 70-75. Since I have been back in a full size V8 I have found that they really suck the gas when sitting still and accelerating.
I must have different gears in my Tundra. It's a 2015 4x4 crew max with the 5.7. It averages right at 12.9-13 normal driving at legal posted speeds. Gets around 10.9-11 towing a 19ft Skeeter at legal speeds. Never, ever gets better than 14-15 mpg.
same gears if you have tow package. Problem might be right foot. Also, depends a lot on traffic. Open hwy and mine is good but when I get in stop and go traffic it falls off quick. Do have larger tires and lift?


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Re: Need Real world MPG's...thanks! [Re: d] #12584040 01/18/18 01:31 PM
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Almost all Tundras with the 5.7 have the same 4.30 gears. If yours came factory with a hitch receiver and a place to plug in your trailer plug, then you have 4.30 gears. Great for towing, not so great for gas mileage.


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Re: Need Real world MPG's...thanks! [Re: d] #12584179 01/18/18 02:57 PM
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For a long time I attributed the 5.7 tundras poor fuel mileage to the gear ratio, but a few years ago I compared the final drive ratio of every gear in a tundra to the current GM, ram, and ford offerings and there was not a big difference. The tundra 4.3 rear end is set up with higher rear ranges in the transmission so that in the end you wind up with a overall similar ratio to the competitors. In the end I think they have poor fuel economy because they are a 400 hp (or nearly) 4 valve per cylinder large (for the time period) displacement v-8. That engine is designed to burn fuel... and lots of it, that's how it makes its power. The others ram and gm with cylinder deactivation and ford with smaller displacement turbocharged engines give you a combination of power when you need it and economy when you don't. I would be interested to see a real world fuel economy test done with a Toyota 5.7, ford 5.0 and nisan 5.6. My bet is there wouldn't be a huge difference and at lighter loads the 5.0 would access due to smaller displacement but as you start stacking it on the 5.0 will join its buddies.

Re: Need Real world MPG's...thanks! [Re: d] #12584322 01/18/18 04:31 PM
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Yeah I've never looked at the Toyota transmission ratios, but it did seem like my dad's Tundra was always running higher RPM than I thought it should.


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Re: Need Real world MPG's...thanks! [Re: redchevy] #12584527 01/18/18 06:45 PM
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Originally Posted By: redchevy
For a long time I attributed the 5.7 tundras poor fuel mileage to the gear ratio, but a few years ago I compared the final drive ratio of every gear in a tundra to the current GM, ram, and ford offerings and there was not a big difference. The tundra 4.3 rear end is set up with higher rear ranges in the transmission so that in the end you wind up with a overall similar ratio to the competitors. In the end I think they have poor fuel economy because they are a 400 hp (or nearly) 4 valve per cylinder large (for the time period) displacement v-8. That engine is designed to burn fuel... and lots of it, that's how it makes its power. The others ram and gm with cylinder deactivation and ford with smaller displacement turbocharged engines give you a combination of power when you need it and economy when you don't. I would be interested to see a real world fuel economy test done with a Toyota 5.7, ford 5.0 and nisan 5.6. My bet is there wouldn't be a huge difference and at lighter loads the 5.0 would access due to smaller displacement but as you start stacking it on the 5.0 will join its buddies.
My brothers 5.0 does worse on the hwy than my Tundra. His lift is a little taller. From what I have read at HWY speeds of 75 or so they are all pretty much the same.


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Re: Need Real world MPG's...thanks! [Re: d] #12589883 01/22/18 01:56 PM
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Ecodiesel with a tune. Took a 500 mile trip to the ranch and back 65-70 mph 4 adults luggage for 3 days 500 lbs of feed 2 ice chests and 2 5 gallon igloos full of water. 32 mpg round trip banana love this truck.

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