Increasing the MPG of your car

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Moderator: RichardW

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Joined: 13 Aug 2002, 18:06

Increasing the MPG of your car

Post by kevin »

following on from the discussions on the Peugeot forum regarding the economy, or lack of it from the 306dt, I would like to know what is the maximum anyone has achieved from thier own vehicle, either petrol or diesel, and all relevant information regarding the speed and conditions.
My own personal best was 75mpg in a diesel 309 at around 50mph on a run from Leyland in Lancashire via Carlisle back home to the Scottish borders on A roads.
A colleague in aiming to achieve at lease 85mpg out of his Montego TD estate, short of fitting a sail to the roof he will give it a good attempt!
any suggestions welcome

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Joined: 21 Dec 2001, 16:19

Post by mbunting »

Best figures - normal driving, not being obviously economical.
1994 306 XTDT - 48mpg <img src=icon_smile_approve.gif border=0 align=middle>
1996 Rover 420Sdi - 54mpg <img src=icon_smile_approve.gif border=0 align=middle><img src=icon_smile_approve.gif border=0 align=middle>
1998 Merc A170Cdi-68mpg on the north of Scotland Thurso - Ullapool.<img src=icon_smile_big.gif border=0 align=middle>
1994 Xantia TD - 44mpg <img src=icon_smile_cool.gif border=0 align=middle>
Rover had the best 0-60 time.
Merc was better in gear - smooth and flexible.
306 was best around bends ( unless wet, when Merc was king )
Xantia is best over bumps !

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Joined: 21 Dec 2001, 16:19

Post by mbunting »

In the interests of economy, why don't all cars have thier back wheels arches covered - similar to the Honda Insight ?
Additionally, the under-tray fitted to most modern cars would help the airflow. The Merc in my previous post was more or less completely flat under the car, as it was all covered up !

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Joined: 20 Oct 2002, 16:00

Post by jeremy »

On a number of occasions I achieved 48 MPG in a Renault 21 1721 petrol. I was driving at about 55-60 mph as the thing was blowing out oil from the camshaft bearings and I didn't want to damage it. The first time I did it I had 4 people and a medium sized dog in the car so it wasn't a case of the thing being lightly loaded.
Although they look strange the Renault 21 was extremely aerodynamic and when you could get it to run properly the engine was extremely tough - as it didn't seem to came to any harm when it lost its cooling water which it did with monotonous regularity.
By way fo contrast on holiday last year my BX DTR turbo was doing 46 MPG but I suppose the comparison is not fair as I was probably going 15 to 20 MPH faster most of the time.
In the past we have had an 1800 Vauxhall Firenza which had nothing apparently wrong with it buy used so much fuel that we would go out in a 4.2 Jaguar for economy. I also recall a ford Cortina 2000 GT which seemed to use less fuel the faster it was driven. I recall that the only time I got much over 30 out of it was when I was late for a Christening at the end of a 250 mile run and drove the last bit (about 70 miles) as near to 100 as I could manage in it! from discussion with 2000 capri owners the fuel consumption trait was not confined to my car.

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Post by arry_b »

170 MPG [:)]
Honda C-50 [:(]

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Joined: 01 Apr 2003, 17:27

Post by jkirkwood »

Personal best in an Espace 2000 TXE was 38mpg over a few gentle runs from Luton to Gatwick! Round town its a different story though. Very different.