Tundra fuel economy 5.7

I don't change my driving habits to eek out as many miles on a tank I can, but even if I did there's no way I'd get above 16.

I have a 2017 4x4 limited with a cap. All else stock. 70mph on a flat highway and no wind, the instant mpg display stays right at 15. Maybe you guys with higher mpg are blocking traffic on the highway doing 55mph and accelerating out of red lights without going over 1800rpm?

 

No! On the Interstate I set the cruise to 72 and let the adaptive feature do its thing so I stay with the flow of traffic, usually varies between 65 and 70. On secondary roads I also drive the speed limit, usually 55. I take of normal (I guess), really don't watch the tachometer but I sure don't accelerate like a fool so I cam come to a complete stop again at the next light.

With that said, right now my average is only about 14-5 mpg because it is cold, I mostly drive around 10 mile trips and I let it warm up in the morning.

 

I do 70-75 on the highway and in the city i do the posted speed limit...i don't floor it from a dead stop at a red light....i get anywhere between 14-17MPG depending on if I'm more hwy or city streets....tire pressure helps a bunch too....and clean oil....

 

Are you resetting the display when you reach cruise control and letting it readapt once at highway speeds to get that number? The fuel economy average display is a total from whenever you last reset it. So if you drove 5000 miles and got 15mpg and then drove 200 miles and got 17 it's not going to change the overall total enough to reflect your highway driving. My guess is you're getting more than you think at 70mph but you haven't reset it in awhile. At that speed you should be at least in the high 16's, if not 17.

 

I wasn't referring to the average display, but the instantaneous bar. That bar is stuck at 15 when cruising at 70. I run 40 psi and change my oil every 5k.

My point was, if the Tundra cannot get higher than 15mpg on a flat highway, I don't see how anyone is getting 17, 18 or 20 mpg especially when you have to average in at least some city driving to get to the highway, hills, and wind.

I don't really pay attention to my average otherwise since it's 70 percent city, it's always around 14.5 to 14.8

 

Have you tried hand calculating your trips? I did a trip to SC from Florida in my 4x4 with cruise on at 80mph most of the time and averaged 16mpg. I wouldn't trust that bar. Mine reads the same as yours. I don't think it's accurate.

 

My 4.7 gets 17-20 on the highway. Around town it is like 13-14. I have a customer that averages 15-17 towing with his 5.7. I also didn't buy my truck for fuel economy. I bought it to move crap.

 

I hand calculate at every fill up just to make sure it's not fluctuating but since I don't get enough highway miles I was wondering what I might average on the highway and the only way to do that is look at the instant readout besides going for an unnecessary road trip.

Maybe that display is totally inaccurate (and in that case an unnecessary gimmick)

 

the average display is the average across all fill ups since last reset. if you never reset it (ie: I never reset mine in my 4runner for 4yrs and it came out to the same average as I was tracking manually, until I had to replace the battery). once I replaced the battery the average reset and now it is off compared to my lifetime average. In 4yrs my lifetime average mpg was 17 mpg across 157 fuel ups.

here is my manual stats ...

 

I had calculated mine the last fill up, I currently getting 12.9 MPG. Most mornings the truck in warming up and only driven 3 miles to work. About twice a week I go into town about 12 miles. During the Summer months when I work in town I get about 16 to 17 mpg. I am driving to Salt Lake city next month I will recalculate after my trip. Hopefully better than 12.9.

 

I don't think you can complain about 12.9 MPG when you let the truck warm up, drive only short trips and on top of that use winter blend fuel.

 

You are the epitome of a lead-foot.

 

Get the hypertech inline calibrator. You'l gain 5 back.

 

I understand how the average display works. I wasn't referring to that though.

 

Anyone ever hear of getting better mileage by deleting the secondary air pump?

 

Not sure what the secondary air pump is but if it is part of the emission control system you will have a check engine light on. Also, most cars/trucks will remain in open loop when the CEL is on and burn more gas.

 

Talking about fuel economy, I just recently created a Fuelie account to keep track of my MPGs. What is really interesting is when you look at all the other 1/2 ton trucks and apply the filter for the V8 engine they are all within 2 MPGs on an average.

 

@71_340 i just heard a guy who owns a fleet of Tundras for his company say that. That’s as far as I got though. As far as the engine light, that can be handled with a custom computer tune.

 

I guess with a custom tune you can bypass a lot of stuff but the average Joe, like me, doesn't have one. I know back in the 70's/80's I took a lot of air pumps off along with the related manifold tubing. Things were a little easier back then.

 

I apologize in advance for throwing canadian numbers in but thought I might have a good share. I have a stock 2015 double cab TRD with 70000km on it. Only thing done to this truck is one size taller BF' installed last year to replace the factory bouncy ball Michelin's.Never paid much attention to fuel economy till this spring when fuel went to over 2.00/litre up here. Let me just state this is not a everyday driver and does not run in the city. It spends most of its miles running between Sudbury Ontario to North of sault ste marie back and forth to camp. Was contemplating replacing this seven year old truck with something new but figured I should actually just see what kind of fuel numbers I am currently getting compared to the new trucks. My findings were quite surprising. What kills a tundra on the highway is the shift out of top cog on the highway to climb a grade. Setting the cruise at over 100kmph will cause this shift often and when the tach climbs to 2000 the fuel mileage suffers bad. My usual driving practice was to set the cruise at 107 and let the truck do its thing. Last couple trips I backed off to 97kmph and on steep long grades shut off the cruise, held pedal position and let the truck lug over the hill. This would cause slowing of the truck by approx 3kmph on the grade but no shift. Was able to achieve 11.9l/100km with approx 500lb load in the truck consistently if winds were light. This is the same truck I have seen get 22l/100km towing a small trailer in a head wind. With the 5% taller tire that 11.9 average I got calculates to 11.3. Conversion to mpg us is 20.8 and 24.99 can. My neighbour has a power boost and seems to be averaging mid 12's. I beleive the OEM's are making progress but still have work to do. I honestly feel if they would have mildly supercharged the 5.7 and put the 10 speed behind it they would have had a winner. Just my2c. Thanks for reading.