I have a 2005 Acura rl with about 147000 mile. I took my car for the first time long drive. When to Newark Airport New Jersey. Around trip was 154 miles. I got 30.7 miles per gallon.
I included the picture from my dashboard to show.

 

I post a picture of my dashboard showing my average mile per gallon .30.7 picture in the mileage topic.

 

Check my reply from Yiry.

 

Gas mileage is the worst feature of a terrific car. 290 HP, 4100 pounds, AWD, and only five forward speeds is an uneconomical mix.

I've historically gotten 14 puttering around town, 17-19 in mixed driving, 26 highway, and 30 at a steady long-distance 70 mph. My car is in tune, but the only way it'll ever get more is if I drop it from a cargo plane and measure the MPG as it plummets to earth.

 

If AWD could be disabled, that might get a few extra miles to the gallon.

Speaking of mileage, who has the most miles on a 2nd gen RL on Acurazine?

There is an 08 RL for sale on cars.com with 311K miles.

 

There'd be less fuel economy improvement than you'd think. You'd get rid of a little driveline friction, but the car usually defaults to mostly FWD at cruising speed anyway, and you'd still be carrying around the weight of all the extra driveline hardware. Steady-speed highway driving is mostly an exercise in inertia and aerodynamic drag anyway.

 

My gas mileage? I really don't worry about it unless I see a change due to an engine problem.

To be honest, with premium gas at $2.15 a gallon in GA, who cares?

 

Sh-awd is permanent awd, power is always going to rear wheels even in straight line. It doesn't default to fwd at cruising speeds. Anyway, disabling power to RL's rear wheels wouldn't be very beneficial as it's a heavy car and driving dynamics would be completely changed.

 

i have an 05 RL and recently notice the display reads less than 200 miles distance to empty on a full tank. Has anyone experience this before? any help would help. TIA.