Fuel economy thread

[Waugh-terfall]

Car: "BEEEEP" -Please Refuel appears on-screen
Mum: "Hmm, I should make it back home, I'm not filling this bugger up!"
Me: "Well, 6,500rpm in 3rd up a hill doing 8.5MPG 'ain't a great start"

[jcp123]

Got 33.323mpg this tank (~7.05l/100km). Went to Dallas and back with about 50 miles of in-town driving and some stop-and-go in the Metroplex, cycled a/c on and off the whole way. Cruised at 60-65mph. Had a 200lb passenger and about 60lbs of luggage on the way home, too.

Probably means that cruising on the freeway with no a/c it gets about 35mpg (6.75l/100km)...not bad for a car that wasn't rated anywhere near that high!

[my porsche]

Well...just calculated my MPG with about 15% highway and 85% city:

11.19 ****ING miles per gallon.

Now I realize I drive a truck with a big V8, but I think it's rated at 15/19, and the way I drive, I would be scared to see how you drive to get 15/19...

[jcp123]

It's all in how you drive. Ease up on the throttle a bit and you should see your numbers start to improve. I had a '92 Bronco that went from 8 to 13+mpg (in town, I might add) just by changing my driving style. My Dad's F150 SCrew 4.6 averaged 15 in town with an average driving style. I wouldn't be too worried.

[PerfAdv]

'06 Subaru Legacy (2.5T AWD Auto)

On-board computer records Avg. MPG. Last 3,500 miles got me 18.9 MPG or 12.4 L/100km.

The MPG meter shows high 20s and even low 30s when cruising on the highway. The best I netted on a road trip was about 24 MPG (9.8 L/100km), 90% freeway...

[Ferrer]

Originally Posted by jcp123

Got 33.323mpg this tank (~7.05l/100km). Went to Dallas and back with about 50 miles of in-town driving and some stop-and-go in the Metroplex, cycled a/c on and off the whole way. Cruised at 60-65mph. Had a 200lb passenger and about 60lbs of luggage on the way home, too.

Probably means that cruising on the freeway with no a/c it gets about 35mpg (6.75l/100km)...not bad for a car that wasn't rated anywhere near that high!

For a 2-litre car that's just amazing. Of course doing 60mph explains it. I usually do 80-90mph in the motorway and this shows...

[jcp123]

Originally Posted by Ferrer

For a 2-litre car that's just amazing. Of course doing 60mph explains it. I usually do 80-90mph in the motorway and this shows...

There's others getting better than I. One at a Focus board at which I post is claiming 37mpg or 6.35l/100km from his SVT (or ST170 over there), though I can't say just how truthful he is. From what I've heard, 34mpg is just on the high end of average for the SVT's. A lot of guys using the new Duratec 2.0l (which is the Mazda 2.3l with a shorter stroke) are routinely getting even better than that, returning 37-38mpg, one guy even claiming he got 40mpg (5.9l/100km) on the highway.

I think I have a true 35mpg in this car somewhere though.

[henk4]

Originally Posted by Ferrer

For a 2-litre car that's just amazing. Of course doing 60mph explains it. I usually do 80-90mph in the motorway and this shows...

I get higher mileage with a 2.2 litre car, but you know

[IWantAnAudiRS6]

Shhhhh, Albert doesn't like the 'd' word!!

Update- managed 54 miles for 5 litres of fuel. Nearly 87km on 5 litres of fuel, which makes it... 49mpg/5.74l/100km/41 US mpg

[jcp123]

I also just calculated my overall average since I bought the car...comes out to 26.812mpg or 8.77l/100km, apx. 25% freeway/motorway driving, the rest split between city and country roads on rolling hills...


Edit: yes, I'm postwhoring in this one...

[my porsche]

Originally Posted by jcp123

It's all in how you drive. Ease up on the throttle a bit

Thats what I meant by "id be scared to see how they drive" I use like 5-10% throttle pressure and take maybe 5-10 seconds to accelerate to 30, i do drive with the windows down and subwoofers using a bunch of power though, would that cause the alternator to use up gas?

Makes me want a car

[jcp123]

Just got 28.79mpg (8.17l/100 km), all on our rolling hills and 50% in-town driving, 50% country road, no freeway use. That includes a couple of hard WOT passes, too...driving carefully and boosting my tire pressures are really helping out it looks like.

Taking a nearly 2000mi round-trip ride to Illinois and back next week, we'll see what kind of numbers I get. I'm hoping for 35 mpg (~6.75l/100 km) or better...

[Quiggs]

I think I'm the only person who tries to get bad mileage... It's like a contest to see how badly I can beat this ish out of a 2.0L. I can't seem to do any worse than about 24.5mpg, and that's with a bad cat, bad O2 sensor, dirty air filter, old plugs, wires, cap, rotor, an exhaust leak, and a random misfire.

[jcp123]

Originally Posted by Quiggs

I think I'm the only person who tries to get bad mileage... It's like a contest to see how badly I can beat this ish out of a 2.0L. I can't seem to do any worse than about 24.5mpg, and that's with a bad cat, bad O2 sensor, dirty air filter, old plugs, wires, cap, rotor, an exhaust leak, and a random misfire.

Damn. My 2.0l will get 15 if you push it much, it's easy to only return 21 if you're not paying attention to your driving.

[speedy_2]

I've got two cars at the moment.

1998 Camaro Z28 6 speed 5.7L V8 (Only Mod is Cat Back exhaust)

18 mpg City / 27 mpg Highway - I probably get around 20-22 if I'm doing 80+mph on the interstate.

1998 Cadillac Seville STS 4.6L DOHC V8- Stock

19 mpg City / 26 mpg Highway - Work and back is an even 19mpg. Highway speeds at 60-65 26 mpg is easy. I can cruise up to 90mph and still get an even 20mpg with no problem.

Both Cars get 93 Octane.