Terrible Fuel Mileage

I have filled up my 2012 Tacoma 4.0L Supercharged three times now since I bought it.

-I did not calculate the first tank.

-The second tank I averages 14.5 MPG - not impressed

-The third tank I thought I would really baby it the whole tank to see what I could achieve - 16.5 MPG - still not impressed at all.

Not sure why I am getting such crappy mileage? I have 265/60R18 factory H/T tires and I have a bed cover which should help. TRD air filter is clean. Tires are aired to 35psi. The truck only has 16,000 miles.

Any Ideas?

The supercharger was installed with one mile on the truck, according to the dealer records. Would installing the s/c before the engine was broke in have an affect?

 

Is the majority of your driving in the city? If so, that's about average. I got 15.8-16 MPG for city driving before I upgraded to 265/70/17's. I'm still working on my first full tank since the upgrade but I can already see my ultra gauge going down. I can only imagine how much more aggressive I would drive if I had an S/C under the hood. These trucks come with the engines already broken in from the factory, I'm sure someone else with my mechanical knowledge will speak up. But I'm pretty sure that doesn't have anything to do with it.

 

I'm no expert but 14-16 seems about right with a supercharger to me Maybe even a little high.

 

No offense but if you wanted good mileage you shouldn't have bought a V6 truck or V6 Truck with a SC. The 4 banger will get you better mileage. Just saying...

 

https://www.fueleconomy.gov/feg/Pow...2012&make=Toyota&model=Tacoma 4WD&srchtyp=ymm

Even the gub-a-mint says you're normal in city, and they don't test the SC.

Sorry you're not impressed, but not sure what your expectations were based on. WAG? Hearsay?

 

Really? Every other supercharged guy says he gets the same mileage or some say 1mpg better. I am doing mainly highway driving. I live in a small town in WI so very little city driving. I can see getting 14-16 when Im out having fun but when I babied the throttle for a full tank and still only got 16.5mpg.

 

A lot of guys on here are averaging around 20mpg with or without supercharger.

 

Highway driving being what speeds? What's your transmission? Auto, or manual? In my 6 speed manual I see a DRAMATIC drop in my MPG just between 55 and 65. At 70 I see my MPG's around 15 depending on terrain. I know my manual is geared different, and lower than the automatics.

 

No supercharger and I hover in the low 13's

 

No supercharger here, only V6 4by4 LB. City driving I get 16 max and that is babying it, more like 14-15. Best I got was 17 which was highway. The dudes getting 20 must drive like a bunch of school girls or are bad at math.

 

Other factors are the winter blend gas, as well as colder weather. My last tank was ~17.5 mpg, whereas over the summer it was ~ 19.5 mpg.

 

Are you running the premium fuel required by the S/C?

Some people cheap out on this, the ECU retards the timing to avoid detonation, mileage suffers.

 

Try switching the diff oil over to synthetic. I'd also slap some new plugs into that bitch.

 

AUTO trans and cruising around 60mph most of the time.

 

this is true. Maybe it will increase in summer.

 

For sure running premium fuel.

 

I am going to drain my oil and switch to synthetic because its almost a quart over from the dealer. I will also switch out diffs to synthetic. I will try and get this all done this weekend.

 

Sounds like I am getting normal mileage. I was expecting around 18 but I am wrong. Thanks for the quick response guys.

 

go on a nice back road that you can average about 50mph. then get your mpg. I did this driving on route 2 from north adams,Ma to greenfield,Ma and back. Try to stay below 2k rpm. I Got about 22 mpg, in my stock truck.

 

I will try this. There is a back road that runs parallel with the highway for my way to work. I will take that road everyday next week and cruise around 50mph just to see.