So this is some mixed highway, and in town driving, I usually don't dive highway, the one time I did actually calculate it I got about 29 mpg, the best I ever got was 31 with a tailwind, and going 55, but I noticed I can only go about 230 miles on a tank before filling up.. I think I have a 16 gallon tank? And I only got 14.9 mpg last tank, I went 222 miles... Anyone have any input? Is this normal, I noticed during the summer my milage was MUCH better, Do I need a tune up? The plugs aren't that old.. (This is in my '86 btw)

 

Thats normal.

I was down quite a bit. You can expect around 1-3mpg loss depending on temperature.

 

This was recently covered in another thread. Winter fuel mixtures tend to yield poorer mpgs. Here they oxygenate the gas for less pollution unfortunately that translates into poorer mpg.

 

I know, but how many miles are you guys getting out of a tank of gas?

 

I can't really compair since I have a v6, bigger tank but I was down around 80km! Im slowley getting the mpg back ( unhooked EGR, 4.88's etc.)

 

You have taken in to account that in the winter! The cold/snow changes a multitude of things.
1: its colder, more rolling resistents through stiffer lubricants,oil, tires, etc.
2: most people run their vehicle a bit longer just to stay warmer.
3: It takes longer to warm up the engine, which means the engine stays in "open loop" longer[fuel/air mix is not "Stoichiometric"]
4: If you have a remote starter, it can knock your milage back [see #2&3]
5: if you drive on snow, it hurts your milage because you have more resistents added as you "compact" the snow driving over it.
6:many people dont check/correct their tire pressure from season to season, cold means lower tire pressure, [in affect, a lower tire ratio]
7: depending where your at in the country, many fuel companys change the "formula" of their fuel in the winter, [helps with better starts, anti-fuel line freeze up, etc. but, on the down side, not quite as much "oomph" out of the same amount of fuel]
8: you almost always use more electrical power in the winter, heater on high, rear window defog, headlights on more,etc.

Any of these reasons might only be a few % points. But, as they start to add up, I've had customers see up to a 20% decrease in milage.

 

It is also very easy to pick up a couple of hundred pounds of ice, snow and muck stuck to the underside of the truck - hence more weight, and drag, also contributing in a decrease of milage.

 

Well thanks for the help again.. but for the 3rd time, how many miles do you guyys get on a tank of gas?

 

I've been getting about 230-240 on 18 gal. with my '05 Taco. Last spring when I bought it, it was more like 300. That's combined driving.

 

My mileage would go down because they started adding 10-15% Ethanol to the gas in the Portland Area during the winter months but in the infinite wisdom of the Oregon Government they are adding it to gas across most of the state.

 

mine has gone down, i went from 320 miles a tank, to 270. I am guessing its a combination of winter gas, and lots and lots of wind (i moved this month).

 

Yeh I'm gettin about 230, I WAS getting like 300 also.. Maybe gas is just getting crappier, and its winter?

 

My last tank I got right at 270 miles, I am looking more in the area of 250 miles on this tank. In the summer I average around 300 mpg's.

 

I averaged 230 miles with 33" tires. This winter I'm around 200-210 miles.

 

so you're getting like, 14-15 mpg?

 

Yep. Glad my work is only 2 miles from where I live.

 

Thats amazing!

 

this sucks, I get the fuel ecoonomy of a V8, and a whole 1/3 of the horsepower it has..

 

29-31MPG????? Are you sure you're calculating this correctly? My friend's 22RE doesn't get near that (more like 24-26MPG). My other friend's 2.7L 5-sp gets about the same (24-26MPG highway).

Also, asking what everyone's getting per tank tells you nothing. You HAVE TO ASK FOR MPG FIGURES!

 

My car dropped substantially, $30 used to last me atleast 275km, I lasted 110km on $30 this week and the price of gas hasn't changed, its actually dropped, Im guessing its from letting it idle and warm up for 15 minutes every morning to defrost it. Il be really happy when I get 5th gear back, I could probably get 450km's out of a $40 full tank.. just need to spend $20 on shifter linkage bushings.