also wheather windy, many hills, very hot,very cold etc... many factors could
false you mpg

 

I did a trip this weekend up to the Santa Cruz ,CA area...
I average on the open road... 35 MPG..

 

Do A True Milage Test. Fill It Up Drive 60 Miles On Hwy. Refill Divide Milage To Fuel Used 60 Miles 2 Gal Used = 30 Mph. Try It.

 

MAN!!, I had 27.5 MPG, On Wheelie's DIC, and my mother used him suddenly and killed my gas Milage, Now it''s down to 22.7 MPG!, UGH!!!, now I have to get it back up again!..oh well...

 

You have to make sure whoever is allowed to drive your ride is properly briefed and respects it. Sure, we can't be stingy old scrooges and selfishly refuse any other family members from the privilege of driving whatever prized vehicle is at hand, BUT they owe us some respect for the vehicle since they know we're gah-gah about it.

 

I Do Calculate It Myself At Each Fill Up. I Also Reset The Dic At Each Fill Up. They Are Always Very Close And Not Good!

 

My Window Sticker Says 24 City - 30 Highway (2007)
I DRIVE MOSTLY HIGHWAY AND STILL DON'T EVEN GET THE ESTIMATED CITY MPG

 

Almost sounds like its running a little rich.

I wonder if you've got a borderline defective oxygen sensor that is flakey but not enough to illuminate a CEL (Check Engine Light)? Would be very unusual for a new vehicle, unless somehow some silicone based fluid or other substance harmful to O2 sensors got into your fuel. How is the engine running? Is it smooth and powerful? The main sensor the ECM relies on to set air/fuel mixture is the oxygen sensor. There are two plugged into the exhaust-- one in front of the catalytic converter and one behind it. The one in front is the one that the ECM relies on for feedback on the air/fuel mixture. The one behind the catalytic converter monitors emissions (sort of).

If the dealer can't find any other cause of the low mpg, ask them if they will, as a courtesy, change out the front (in front of the catalytic onverter) oxygen sensor.

On the other hand, it could be a flakey coolant temp sensor. If the coolant temp sensor isn't telling the ECM that the coolant is as hot as it really is, the ECM will continue to command a richer mixture thinking the engine is still warming up and not up to temp yet. On your DIC, does the coolant temp show 190 - 196 range most of the time after the car has been driven long enough? Coolant at full engine operating temperature should read in the 190 - 196 range. It will rise above this at stoplights etc, but come back down when cruising.

 

I agree wholeheartedly LR!, My mother loves my ride, and she usually gives me an excuse to drive my beloved Wheelie, in this case, my mom accidently locked her keys into her car at a gas station, she got a ride from a nice person to where I was at, (WALMART) she told me she needed to drive Wheelie at the gas station to pick up her car, she got her spare key before she picked me up...while I was observing her drive, the MPG started going down dramaticly, as she has a tendency to accelerate hard when she is nervous..I just looked at Wheelie'e display and said ..OH NOOOO!! LOL

 

on my trips to L.A. from bullhead city, az and back I average 31.5 every time and there are some good hills too pull out of Needles on the I40. I went cruising the beaches in so cal last weekend and got 32.8 just cruising Beach bl, PCH and the local fwys. I am also looking for more mpg so will work on exhaust and intake mods.