any ideas, just about to do loads of miles and for about 700 of them i could do with saving a bit of juice. twin turbo, swb.

come on braniacs do the business for me....again.

ta

paul :p

I read the acetone thing was a waste of time, not to mention the un-known long term effects.......but it's all opinions....

 

true... ;)

 

however on long trips I usually put in an octane booster. smoother idle, better boost and my opinion is a better drive. i do think the mileage was better... was noticeable. on the odd occasion - like the way home from a track, aviation fuel was mixed instead - and the mileage was certainly up. Mine is a Japanese tuned car.

i heard it was 85mph and i tend to agree with that figure really

 

I was just trying to save fuel and subsequently the enviroment!..........officer :D

"zero" ;)

 

 

:rofl:

You can work it out, it will be different for different cars - but the rule of thumb is the less RPM you use the less fuel you use.

 

In top gear you need to be going fast enough so you have enough torque to keep going and not stall which in most cars is around 2k rpm (but will be less in high torque cars and more in low torque cars).

 

Depending on your gearing will be between 50-60 mph

Article in Auto Express recently said to save fuel drive like this... foot to the floor, when you reach 2000 rpm, change up and floor it again. Do this till you reach your travelling speed then foot off and on (to the floor) to maintain driving speed.

 

They proved that for a wide range of petrol cars it reduced fuel consumption by about 16 to 20%.

 

Theory is - over 2000 rpm you are using fuel to combat friction. With the throttle wide open there's less obstruction for max airflow, and also with the throttle wide open a 'modern' engine management system will out-perform what a human can do with the loud pedal when trying to save fuel.

 

A colleagure tried it on a few tankfulls (1400cc VW) and says it definately works although holding a constant cruising speed is a bit difficult.

 

I've not tried it in my NA, but it could be fun in a TT...

 

Cheerz

 

Jack