80-85mph highway mpg?

I bought my 2010 on Thursday and drove home averaging 80-85mph and went 380 miles before stopping for gas. I had one entire bar left on the gas gauge so I'm sure I could have made it further. Sounds like you drive like I do. Let's just say I'm very impressed with the MPG I've seen thus far!

 

Looks like 40 miles per gallon.

 

I don't know if there's a newer version of Updated MPG vs MPH chart | PriusChat.

 

Hello lead footed buddy!! I drove 80-85 on I70 daily trip 80 miles with two up hills and two down hills (what goes up must come down). Anyway, my average range 50-51mpg, but today due to hurricane Sandy I got the worst ever 46.4 MPG

I drove fast going down hill, like up to 90 and the when I'm going up the hills my speed goes to speed limit, for flat surface I go in 80s.

 

Btw each bar represent about 50miles, so 10 bar is average of 500 miles, the max I got from a single gallon was 512 miles (light foot week), other times 480-500 miles per gallon.

 

That's one light foot to get 512 MPG.

 

Is this from the too optimistic trip computer or from manual calculations?

 

43 mpg hauling nice person in a 3rd Gen on any semi warm day. Prius even gets good mpg's running 100 mph

Mike

Mobile on my SGH-i717

 

Yes it is, and if the trip computer is lying to me, then I'll have no other reliable back, but to just be happy that doing every fuel up I don't have to pay double of what I used to pay.

 

I know, that was one week where I was pretty sick from flu, passive driving, barely pays any attention to cars flying past me. I didn't realize it until I went to gas up and the full tank indicates 512 miles before next fuel stop.

 

I would expect that driving in the 80 - 85 mph range would get you low 40's to high 30's mpg. And consulting Bob's table confirmed this guess.

Why the need to drive so fast? You'd get another 10 mpg if you bothered to slow down to 65 - 70 mph.

 

. . . and why do people jump out of perfectly good airplanes while they are thousands of feet up in the air?

 

I would guess only a tiny percentage of the population actually never waste any time in any given day.

Also, slowing down will save you money, so yes, time is money.

 

Since most people do not work 24hrs a day I find this argument non-persuasive. Maybe it's because I'm salaried? lol

Seriously, at those speeds you should be just tickling the 40mpg area depending on your tire setup. With a good 15" LRR tire I'd see you in the low 40s. With anything else, including 17" wheels, I see you in the high 30s. Assuming you have decent roads and good weather.

 

As long as you have fuel economy in mind, I am confident you'll slow down to 75 mph or even 65 mph. The amount of energy required to push through the air is too much at 85 mph.

If I recall correctly, even at 55 mph, half the energy required to maintain speed is to push air.