I was wondering what is everyone's highest mpg city/highway. I know mine which is all stock gets ~17.5 city, not sure about highway.
Is 20-21 city achievable or am I a dreamer?

 

18.75 city/ hwy
I can get 21.4 driving 55 hwy, driving like Grandma. No fun!
2001 2500 Lot of mods.

 

If careful and steady I've seen 24/26 on the hwy.

 

My truck gives me 19 /20 around town trips and 27 or better on a long trip at 65 mph. I have got 15.6 towing my fiver at 55 mph. fiver is 10500 loaded. Its a keeper, these 95 2nd gen give great fuel MPG.

 

Been getting 16-17 on the backroads and just hit 21 hwy coming back from Atlanta. Just over 400 miles with half a tank, drove another 150 back roads and still had an average 21.4..best ever since I put in the #10 (also first hwy trip) cruising at 60-65..once I get over 70 the MPGs drop to 16-17.

 

To OP 20-21mpg city would be a stretch - possible yes, but you'd have to drive it to get it. A low stall converter or using the lockup switch would be a must.

Last tank I got 18mpg towing a skid steer on the goose neck but I made Grandma look like a speedster. Last time I checked mileage when empty I was at 21mpg.

 

I' gotten 24.5 @ 55 & depends on the wind & if I' in hilly country can get from 20-22 @ 70 & have run 700 mi on a tank quite a few times empty.

 

I usually average around 20mpg running around 60mph. Get a little more in the summer, a little less in the winter. Best ever was 25.6. It was a 200 mile trip and traffic was heavy so I set the cruise about 54 and just rode. Yes, it took forever to get there, but it was just sipping fuel. As my speed increases mileage drops. I get about 14 at 70mph. Don't drive that fast very often.

 

I get 22 hwy, but 15.5ish city driving, and by city Im talking 25-45mph stop start crap.

 

4X4, 6 speed, Quad Cab, 8' bed, straight exhaust, BHAF, +27 psi boost.

Around town generally between 18-19 mpg. But I drive very conservative.

Interstate 20 - 22 mpg. But I drive very conservative.

Did I mention I drive conservative?

If I drove 60 mph I might be able to hit 24 mpg. But I don't reckon I'm ever going to drive that slow for any substantial amount of miles.

Was doing to private hot-shotting for a while. Was getting 13 - 14.5 mpg towing my 24 foot enclosed trailer. Oh ... that's towing conservatively. I ALWAYS towed at 67 - 68 mph. I really dislike buying fuel (of any kind).


BIGBLUERAM

 

I get 19 to 20mpg (US gal) at 60 mph with my 02 auto, 4.10 geared, 2wd dually. With the camper on extended trips it get 15 mpg average at 60mph.

 

2wd 8ft bed and I have gotten 26.5 calculated. But It was straight highway and cruise control set to 53 mph round trip to Richmond. I will NEVER do that again, my mind was numb going down a 4 lane highway and having everyone pass me.
Best I've gotten in normal highway driving is 22, ranging between stopped and 65mph.
My usual full tank mixed driving is ~17 mpg.

 

My best was 21.5.
2wd Dually w/ auto trans.
Road Trip from VA Beach to Washington DC, no cargo.
Cruise set to 2,000 rpm.
Got passed by EVERTHING.

 

Normal is 18.x combined city.hwy, 21.x hwy only. 11.x towing 11.7K lbs high profile fifth wheel.

 

Got 22.657499320145 after installing a Timbo and keeping it under 70 on a recent trip ti MT.

Also use Power Service white bottle at 1 ounce to 3 gallons religiously.

Tires were aired up highway ribs, weather and temps were warm and clear, calm.

Sorry about the big number! Have my TI83 set for huge carry out and can't seem to get it to stooooooooooooooooppp!!