what type of commute?

Last summer, I puttered at 65MPH for most of my commute, no A/C (crack passenger front and driver's 2nd row windows for good airflow w/o buffeting) and floated between 28-29.5 indicated...I did get one trip that hit 30.1 at the very end. Winter, I got around 26 MPG, indicated. I run 36psi in my tires.

I do have a bluetooth OBDII reader that I use with Torque to watch various sensors. I do have one bank that reads pretty bad LTFT (floats around 7.5-9%...mechanic friend says CEL comes on around 10 or 12%) and the downstream O2 sensor pitches and dips similar to the upstream sensor, all on the same bank...so I think I have a cat slowly dying.

OBDII adapters are pretty cheap, and you can get Torque Lite to read your basic sensors...might not be bad idea.

 

City traffic and on open highway the best I get is 19-21

 

My 2007 V6 Outlander has always gotten **** gas mileage. If I'm really lucky, I might get 25 mpg on the highway with a tailwind. Any crosswind or headwind action, and I'm at 22 at best. In mixed driving, I'd say I'm somewhere in the 19-22 range.

That said, I do have a roof rack, which probably cuts down considerably on efficiency. That also said, I'm willing to put up with crappy mileage in a car that's paid for. And further, I'd be happy to know anything I can do to squeeze a little more mpg's out of it.

 

Serpentor, are you using cruise control? are you using air conditioning? what speed are you going? 70 vs 65 vs 55 makes a difference.

in the city, I can see getting about 19-20.

My wife will go 70-75 with AC on...mpg goes down to around 22-23MPG at that point.

 

I've always gotten less than rated mpg. It's likely the hills where I live, the way I drive, and mostly city driving. If highway driving only, I get within a 2-3 mpg of rated for highway, but I also have more weight in the car than usual. In our V6, I probably average 15-20. On the high side when we actually drive on the highway.

BTW, PSA: Running AC leading to worse gas mileage is a myth. It may have been true when cars were less aerodynamic and not as fast and less efficient, but these days, it's actually just as good if not better to keep windows up and run AC. Cars are engineering marvels these days.

 

No cruise control, yes I use the air conditioner, and drive at 55 - 60 mph.

 

With summer temps back, my mileage has improved 2-3 MPGs in both city and highway driving. Cold temps really seem to take a toll on the V6 performance, even anything in the 40s or lower.

 

Yesterday I managed to reach 25 MPG but there was hardly anyone on the road. I also found out the Fuel Economy from Fueleconomy.gov
https://www.fueleconomy.gov/feg/bymodel/2008_Mitsubishi_Outlander.shtml

 

Our 2014 only gets around 12L/100km (20MPG) in the winter but our commute is pretty short 15km, and in the city. We can get to 9L/100km(26MPG) once we're out on the highways. It's not great, but none of the others with a V6 are better.