14mpg??

M

miller92063

New member
I expected to go down in gas mileage when I added what is listed below, but all the way down to 14mpg??:roadkill: Could I have some other issue?
Here is what I did.

FJ springs with bilstein adjustables up front with FJ bilsteins in the rear with 1.5 spacer. 275/70/17 BFG T/A KO's.


Thoughts??


Edit: Could it just be the tire size throwing the computer off?
 
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Sorry man, I know that wasn't helpful, but it just seemed to fit.

On a real note: I wouldn't put too much faith in that dash computer, I've never really found it to be very reliable.

Go through a tank and use the old calculator method to see where you are. I've notice my mileage has been a little worse lately too and I keep hearing people blame it on "winter mix fuel". Not sure about that, but I do know it takes longer for the the engine to come up to temperature, which means it's in the "open" loop longer. I think this longer amount of time at a higher idle could translate to some loss in mileage, especially if you make a lot of short trips.

Others that are running your tire size and such may be able to add to this.
 
currently getting calculated 13 MPG pretty much the same setup, the only thing i havent done yet is change the spark plugs, still on the oem
 
Def winter blend ! I'm getting hit now too , good thing gas is down for a change , do your plugs & clean the maf sensor bout all you can do !
 
I get about 16 mpg's, but I am pretty light on the throttle. Remember that with larger tires you are actually going faster than your speedo reads. Also, your odometer is showing less miles than you are actually traveling due to the larger rotation of your new tires.
 
Winter is a mileage killer. Engines are not optimally efficient until they are up to operating temp, gear boxes are full of gear lube that thickens dramatically in the cold as well, rolling resistance in the tires is higher. I always go down two to three MPG in the winter, even worse if the trips are short. Park in a garage if possible, eliminate short trips, change your axles and transfer case to synthetic GL5 of the recommended weight. That's about all you can do short of getting on your bicycle.
 
txclimber said:
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This pretty much sums it up, just couldn't find the right one.

Cant park in the garage without taking out the wife. Other side is full of project crap. Will try and do the plugs and maf when it warms up a tad.

Cheap gas prices? Gas was $2.80 here and just shot back up to $3.07 to no damn reason!!
 
miller92063 said:
This pretty much sums it up, just couldn't find the right one.

Cant park in the garage without taking out the wife. Other side is full of project crap. Will try and do the plugs and maf when it warms up a tad.

Cheap gas prices? Gas was $2.80 here and just shot back up to $3.07 to no damn reason!!
Click to expand...

...try 3.70 right now.... but i do mostly 80%city and 20% Highway
 
I'm about 80% city and 20% highway as well, BUT my job is on the other side of my neighborhood so I have a very short drive. And most things are close by as well (entertainment, restaurants.....).
 
Tires will cause the biggest fall in mpg. Invest in a ScanGaugeII and you'll know how fast you're actually going. It also will help you see more accurate efficiencies than your onboard dash computer. Keep your tires aired up if not using off-road and stay light on the throttle and brake...just roll

I'm getting 16.7mpg consistently but I'm also using non-ethanol high octane (91) fuels. My dash computer reads 14mpg but one must remember, larger tires means you've traveled farther than your odometer reads...I have to add 7% to accurately get my true miles traveled and speed calibrated using the ScanGaugeII. At least, this is my experience. It's costly having badass rides...
 
As others have stated, cold weather and winter blend fuel will combine to reduce your MPGs by as much as 10%-20%, with the variance dependent upon length of trip, temperature, etc.

However, moving from a stock 265-65-17 with a circumference of 96" to a 275/70-17 with a 101" circumference is going to result in a perceived reduction of 5% all by itself. Add together winter fuel, thickened gear and motor oil, and the increased resistance of those bigger tires and I'd say 14mpg sounds (depressingly) possible.
 
YotaDriver said:
As others have stated, cold weather and winter blend fuel will combine to reduce your MPGs by as much as 10%-20%, with the variance dependent upon length of trip, temperature, etc.
Click to expand...

Very true! I was averaging 18.x all summer long and now I'm lucky if I see the numbers creep into the 15.x range. That's with the same 285-75-16 mud terrain tires, too.

OP: Yep, that's very close to the rest of us this winter. It's great filling up the gas tank every 4 to 5 days @ $3.45/gallon!
 
I was getting 18 mpg before lift and tires, now I'm getting 17.0 mpg. I do have a slight variation in my Speedometer after the new tires were added.
My speedo will read 60mph, but GPS shows 62mph.
 
The worst mpg is in the coldest time of winter, and for me, the dead of the las vegas summers. Driving style and tire weight are just a couple things in addition to the above posters. W/my style, which is, well lets just say "spirited," right now Im getting barely 15. Most of my mileage in freeway to and fro. For the record, I DO NOT travel more than ten over ever on streets. Now freeways, that's a whole nother story...The BFG A/T or any other are some of the heaviest tires out there. Good off road tire, brutally tough, but heavy as heck. That takes from mpg. Oh, one last thing. My Toy loves 91octane. That's where I get the best mileage and most power. Again, for my style, I can see a huge difference when running the 87octane. Good Luck hope this helps.
 
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