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  #1  
Old 10-30-2006, 11:37 AM
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Fuel economy thread

Everytime I post in an automotive forum, it seems like there's a fuel economy thread. Thought I'd start one here.

Just post your vehicle, mods (if any), and driving style along with your fuel economy. If you use a the imperial system and want to convert to metric, just type (xx)mpg in l/100km into Google and it'll do the math for you. I'll start.

'99 Dodge 1500 conversion van, 360ci (5.9l) OHV Magnum V8, 4-speed auto, 3.55:1 gears. Rolling hills, conservative driving style, lots of cruise control, little a/c use, apx. 75% in-town/25% highway use.

13.8mpg / 17l/100km average, best was 15.69mpg or 15l/100km (which I can improve upon)
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  #2  
Old 10-30-2006, 11:49 AM
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'04 Dodge Dakota Sport Plus club cab, 4.7L SOHC Magnum V8, 5-speed/multi speed auto(3rd gear, 4th gear, and 5th gear each have an overdrive),3.92 gears. Flowmaster exhaust. Hills, not a lot of flat land, agressive starts and overdrive is usually off. Mostly city driving, some highway.
Avg about 12mpg. Highway gets up to 22.1mpg. Towing about 6mpg.
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  #3  
Old 10-30-2006, 11:57 AM
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92 Holden Commodore. 3.8lt V6 (High-flo cat with sports system, S/C Cold Air Intake) 4 speed Auto. Factory stock diff 3.08. Run 98 octane only. No cruise control.

Driving style can be on the fast accelerating at times but i'm a smart driver so i also know how too save fuel at times when needed. 99% Local driving very rare too hit the highways.

Tank size is anyone's guess as it's not standard and has a large dent, But takes on 66 litres average.
14.6l/100km. 19.2/mpg. It could and should run under 10l/100km 28/mpg 100% on the highway.
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  #4  
Old 10-30-2006, 11:59 AM
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Eindhoven, The Netherlands
Citroen C5 Berline 1st generation 1.8 Petrol Différence
Manual gearbox.

City driving - 1 l / 10 km
Average - 1 l / 12 km
Autobahn - 1 l / 13.5 km (fully loaded,3 persons and the boot and rear seat full of junk.
Cruisecontrol Autobahn - 1 l / 15 km (fully loaded,3 persons and the boot and rear seat full of junk.
Italian driving - 1 l / 8 km (!!)
Average driving with airconditioning on 1 l / 11 km
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  #5  
Old 10-30-2006, 12:10 PM
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Copenhagen, Denmark
1990 FIAT Panda 1000 S.i.e 61ci 4 cyl. 5 speed manual
90% city 10% motorway (110 km/t - 69 mph) 40 mpg / 17 km/l
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  #6  
Old 10-30-2006, 12:13 PM
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Rozenburg, Holland
Citroen C5 Break HDi 2.2 Exclusive, 165 BHP. 5-speed manual
between 6-7 litres per 100 km (33-39 mpg).
We have a flat country, but regular traffic jams.
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  #7  
Old 10-30-2006, 12:15 PM
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mini cooper s with no mods (a rarity, but i like my warranty)
with my heavy right foot, a pretty good mix between city and highway, and the addition of up to about 15% ethanol to our gas here in VA, i am getting about 26 mpg.

before the ethanol, i was making just below 28mpg, but the ethanol makes it slower, rougher running, poorer mileage, and makes the tailpipe black like an old diesel's.
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Old 10-30-2006, 12:20 PM
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Quote:
Originally Posted by cmcpokey
mini cooper s with no mods (a rarity, but i like my warranty)
with my heavy right foot, a pretty good mix between city and highway, and the addition of up to about 15% ethanol to our gas here in VA, i am getting about 26 mpg.

before the ethanol, i was making just below 28mpg, but the ethanol makes it slower, rougher running, poorer mileage, and makes the tailpipe black like an old diesel's.
Yeah, the ethanol isn't going that well in cars that aren't made for it. I've heard similar complaints all over the place about it.Performance builders familiar with building alcohol drag engines are looking pretty hard at it though since it has characteristics similar to alcohol (high resistance to detonation, but less heat energy than gasoline).
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  #9  
Old 10-30-2006, 12:26 PM
Lagonda Lagonda is offline
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Belgium
Clio 1.6 16V
7-8L/100km on average
6.2l/100km or so on long highway trips
8.4l/100km when I drive agressively, i'm averageing 8.3 at the moment according to the on board computer.

I once managed to average 5.8l/100km which is impossible according to Renault. I'm really happy with the fuel economy of this little car. It's next to impossible to average more than 8.5 litres.

Last edited by Lagonda; 10-30-2006 at 02:05 PM.
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  #10  
Old 10-30-2006, 12:30 PM
D'ARTOIS D'ARTOIS is offline
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Alfa 166 sedan, 2.0 TS 16v, 150 Hp - I manage just a regular 1 : 9,5 kms - on the highway to France just 1 : 11 kms; excactly like Alfa Romeo states in their brochure.
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  #11  
Old 10-30-2006, 12:31 PM
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Quote:
Originally Posted by jcp123
Yeah, the ethanol isn't going that well in cars that aren't made for it. I've heard similar complaints all over the place about it.Performance builders familiar with building alcohol drag engines are looking pretty hard at it though since it has characteristics similar to alcohol (high resistance to detonation, but less heat energy than gasoline).
theoretically it would work great, it boosts the octane quickly, easily, without as much refining of the gas, but the O2 sensors, and fuel injection systems need to be re-callibrated. what ends up happening is it doesn't see the right numbers coming out of the tail pipe, so it dumps more gas in, and then you get poor mileage.
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  #12  
Old 10-30-2006, 12:32 PM
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97 Golf 2.0 8v, drilled airbox with K&N, no muffler (huge loss of backpressure), close ratio 16v trans 3.67 final drive.
Beat on at all times.
Averaged 28-29mpg driving to school every day.
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  #13  
Old 10-30-2006, 01:34 PM
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1998 Chevrolet Blazer LT 4x4 with the 4.3 liter vortec V6. On average both city and highway driving its around 18mpg. I still have the window papers from the dealership when it was new and it says 16 city and 21 highway, so yeah its still pretty close.
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  #14  
Old 10-30-2006, 02:00 PM
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IWantAnAudiRS6 IWantAnAudiRS6 is offline
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- Peugeot 206 1.1 LX.
- No mods.
- Drive it like you stole it.
- 35mpg street, 40mpg motorway.
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  #15  
Old 10-30-2006, 02:05 PM
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Quote:
Originally Posted by IWantAnAudiRS6
- Peugeot 206 1.1 LX.
- No mods.
- Drive it like you stole it.
- 35mpg street, 40mpg motorway.
you crazy brits
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