whats the best freeway speed for maximum gas mileage?
 

at what speed should i be going on the freeway in order to maximize gas mileage?

i do pretty good at 70 with the cruise on.

ive been told or ive read that in 6th gear it is 68 mph. i think you just need to keep the RPM's below 3.5k in any gear.

Isn't it 65 mph? or is it 68...

time to use the search yet again...

been up to 124 mph, have had the 8 for a couple months now, and i havent even been in 6th, ever :(

either way its not much fun

This is what I have got with the cruse used as much as possible.
55-60mph.....29.5mpg
65-70mph.....27.5mpg
75-80mph.....24mpg

i cruised at 80 for 200 miles all highway and i got less mpg than when i have fun.

on my way back from san diego I averaged between 60-110 through the mountains and I acheived 24mpg's.

My best test so far was 23 mpg @ 75 mph, cruise control, fairly flat terrain.

It's a zen thing - you minimize the vibration, you find a place where the rotar runs steady and you don't feel any resistance like you would when you are in too low a gear, and the car just runs like glass. Hwy 5 has some sweet spots and Hwy 101 between San Miquel and Salinus can be fine, and 85 is legal. Head winds and side winds will steal gas so your best run will be From San Francisco to LA, Less side wind on Hwy 101. Hwy 46 running from 5 to 101 very bad Karma - There was a reason James Dean died there - Passing big trucks very bad medicine.

james dean is dead?

Quote: James Dean is Dead?
Very
head on in a nice little sports car
They show pictures and have a memorial to him at the Jack's Creek Ranch Cafe on 46, that's where they took the body after they pryed him out - put him right there on the pool table.
The guys at Black Well's Corner (largest parkinglot in the world) says he bought an apple and coke on the way -

I shift at 3k to 3750 if its cold. But when it warms up, I think that it is better to put less stress on the engine by not shifting so early. So a typical shift would be around 4k to 5.5k. Unless I am over 70 mph, will I be in 6th gear. Have gotten 20 mpg 60% city 40% highway with ac.

i think theres a memorial at the Griffith Park Observatory also.

0

it depends on the drag coeficient of the car, the norm is that the best possible gas mileage hovers around 55 miles an hour, going slower means that you're using a lower gear and therefore revving higher and going faster means more aerodynamic drag which needs more power to overcome it.

So unless you're a granny you'll never get best possible gas mileage.

i've gotten 26.XX going a steady 75-80 mph..

then again i get 21 mpg @ 110 so i usually go faster...

I average about 23.2 mpg at 68-69. I spend 25% of my commute in traffic so that's my average mileage, not just highway. I average 22.4 with the AC on.

HooHAH
 

[QUOTE=
So unless you're a granny you'll never get best possible gas mileage.[/QUOTE]

Granny's Rule!

:jump:




- Also if you fold in your passenger side mirror, pull in your antenna, and keep you car polished, you get better tank time

Call a porsche a porsche :)

http://www.margie-bookshop.se/ovrigt/se-034.jpg

https://www.bbc.co.uk/worldservice/s...1_dean_300.jpg

I logged the gas mileage on the way to Oaklahoma City last year. I stepped up in incriments of 5 to 10 mph. 75/85/95 mph. Gas mileage 20/22/23. I could not believe it. The only reason I can think of is inertia. The rotor has autorotation to counter the fuel burn at or around 4k rpm in 5th and 6th gear. Piston engines have the oposite piston working against any autorotation. Piston engine cars will not see this benifit.

so you got better mileage going faster?... hmm

We will reverence fine machinery :worship:

Does any historian know the make of the other vehicle?

I bet the memorial at Griffith Park doesn't serve good meatloaf

Also extra passengers, AC, music, headlights, luggage, all contribute to cost-

News said that Share holder meeting at Mobil/Exxon had members demanding tha retired CEO return half his over inflated retirement, and some said this is just like ENRON - Boxer up in arms and FTA snooping around - might get those gas prices down yet.

55mph is still probably the most fuel efficient driving speed, but these days with the highway speed limits at 65, if you go 55mph you're going to end up being rear ended one day, so forget about that nonsense. Anywhere between 60 - 65mph is fine.

That's only when you're not stuck in the orgasmic 5 - 15 mph bumper to bumper traffic jams.