I normally got 17 combined half city half highway. The last tank I drove as conservatively as possible and got 18.9. That was about 60% highway and 40% city. I drove 403 miles on the tank befor refueling. It only took 21gal so I suppose I had 6 gallons still in there.

What's everyone else getting?

 

With 35" tires & city driving, I'm lucky to see low teens.

 

According to Fuelly, my best MPG so far has been 15.9 for a tank. My average is 14.5, and my last tank was 13.5 (I was towing a camper). I have an '00 with a 5-speed and 265/70R16s.

 

I just finished a full tank in mine. 445 miles (still didnt even top off now that I think of it). Roughly ~18.2 mpg on E10 for 50/50 driving. I used to get 19 city/22 highway before this E10 crap years back. Mods in sig

 

ranges from 14-17 mixed 80% hwy/20% city.....have to love the 14 mile trip at 70 mph...totally kills the mileage.

I can stretch up to around 20-21 on the highway with a/c off cruising at 70 (for long trips)

 

I get around 15 in the city. On the highway, it depends on speed, hills, winds, A/C use, and gas quality. It ranges from 17 to 22. I just took a trip to Chicago and back, and on the way back I made it from Morris IL to Lebanon MO (430 miles) on one tank of gas and got 20.1. I had the A/C on all the way, ran on cruise at limit +4, and used 87 octane BP E-10. On the way up, I only got about 18.5 from Joplin to St. Louis on Walmart crap gas.

 

18 highway is my best - I thought the K&N and Flowmaster would help , but apparently not .

 

It would be a negligible gain. Probably not even 1 mpg together. Keep in mind you have to keep it under 2,000 rpms to get a decent mileage with these engines. My plenum opens @ 2500 so I can see the GPM flow double when I hit "vtec"

 

Was it you Raptor that was getting something ridiculous like 12mpg last year? What was the problem?

 

9 city/11 highway.

Clogged catalytic converter. $250 for two maggie high-flows and a $250 weld job fixed that. Just topped off tonight- 19.28 mpg on Wally-world E10.

 

The WORST I ever got was 12.2 - that was between Odessa and El Paso TX, on a load of crap no name gas, cruising 85 into a 40 knot headwind with the A/C on. The BEST I ever got was 23.2, between Durango and Colorado Springs CO, on 85 octane mountain gas, taking my time and sightseeing.

 

You guys all lie

 

it's sad that my supercharged 5.4's get better mileage than the 4.2's

 

Oh Yea! huf huf huf.........but we don't have to buy as many spark plugs AND it's harder to get speeding tickets. So there!