I recently tried this to see if it would make a difference... I pumped my tires up 15 PSI more than the door jamb recommended (50 PSI vs 35 PSI). I drove this way for a couple of weeks and ran through a couple of tanks of gas.Try more PSI in your tires. Be easy when starting off.
Over inflating doesn't help that much, but correcting an under inflated tire helps tremendously. Huge improvement.. but you have to have that problem to enjoy the fix. 100% agree about the ride quality suffering. Ugh.I recently tried this to see if it would make a difference... I pumped my tires up 15 PSI more than the door jamb recommended (50 PSI vs 35 PSI). I drove this way for a couple of weeks and ran through a couple of tanks of gas.
It made no noticeable difference in fuel mileage but the ride was TERRIBLE. On some rough roads, I had to keep my teeth clenched so no fillings would fall out.
Even if over-inflating did improve mileage I wouldn't do it. I can't put up with the bone jarring ride that the higher pressures produce.
I have almost the same setup (no winch) and average about the same as you. Funny thing is, I switch out my tires for the summer (put the factory 255/75/17 Goodyear Wrangler back on) and my mileage goes to over 20.I route myself to and from work avoiding as many stops as possible. I'll use less fuel driving 3 or 4 miles farther. I also rarely get to go over 50 mph.
With summer fuel I'm getting just under 18 mpg these days and just over 16 with the winter blend.
Manual trans, 33s, 3.73s, bumper/winch for weight.
This!Depends on your driving and how you drive. Using a OBDII gauge (like https://www.scangauge.com/ or https://ultra-gauge.com/) if you look at your average fuel consumption it dips a lot every time you accelerate from a light, and then comes back up if you coast to the next stop. If you are one of those people that stays on the gas and then switches to braking hard, you fuel consumption is going to be a lot more.
Likewise 45mph highways without stops are great; 1/8 mile stoplights are not good.