Range - How Much Gas is "Usable"

[Clark2262]

I drive a lot of miles and a priority when choosing a new vehicle is range - the combination of fuel economy and size of gas tank.

I'm doing very well on fuel economy. I drive in "Eco" mode all of the time averaging over 18mpg.

However, if I run until I have 8 miles to empty, the most gas it will take is just shy of 17 gallons in what should be a 21 gallon tank. I'm not able to use just over 4 gallons.

This is just not acceptable. I'm having to stop for gas every three days at the most and some times every second day. I should be getting over 400 miles to a tank and not just 320.

My last SUV with same tank would get me almost 500 miles between fill-ups. It had more horsepower but less towing capacity. I did not expect 500 miles but I do expect to be able to use all of the gas in the tank. (Last SUV had 40 more horsepower and weighed about 600 pounds less than Lexus.)

Anybody else having this problem?

Clark2262

 

[nonamex]

Toyota/Lexus have been very conservative in the reserved gas arena. You would need to run it bone dry to get the full 21 gal. For reference, I drive in Normal mode and my range is 297 mi.

However, my vehicle is loaded with roof rack, light bar, rtt, dometic cooler, and lots of gear. Getting 297 mi is a win in my book. I would love to get 400 mi but that won't be happening any time soon.