Full tank of fuel....

[Neaty]

Unless I have got money which isnt usually very often mine is never out of the red, gets to the quarter way mark peak unless I am going somewhere far where I will put a lot of fuel in it!

[Noggin]

Usually let mine go to the end of the red depending how close to pay day

But have just got 412 to the last tank

[ghost8]

so
I'm gonna do this for the experiment, never let it get  this low before -  needle on the bad side of the white line - and tbh I don't like it.
 Gonna go an fill completely - oh noes, I just see fillet steaks dissappearing down the tube -
 and try, well I will, to drive at a steady revvage mebbe around 3300 rpm on motorway and just over tickover in town. No a/c running  and no windows open -  cause drag
It's been interesting reading your mpg's and I'm sorry but the male ego needs constantly to compare and I'm only a bloke after all!

[Neaty]

you have aircon in your mark 2??!?!

[ghost8]

nope, is why I can't turn it on

[Neaty]

ah i c, what do you reckon is worst having aircon on windows down to drain fuel? i have always wondered this!

[ghost8]

programme called mythbusters did this some time ago
 they got two identical ' s.u.v.'s ' ( americana)  drained em,  weighed em then re filled em with exact amounts of jungle.
they went round a circuit - a nascar track I think -  at exact same speeds for something like 7 hours, one had windows up and ac on, the other no ac and windows down.



any guess' which had the most legs


















the windows down went furthest hands down!

[Neaty]

I thought that might be the case. My mate hired a car in tenerife last year (fiesta zetec 1.25 thingy) and said to overtake they had to turn the aircon off sometimes as it struggled!

[ghost8]

so exactly how / why does this happen,  what is it a voltage thing?

[Neaty]

coz the aircon pump for it is like a power steering pump and is run off the main pulley like an alternator sort of thing ( i think) so drains the power as the car has to work twice as hard to generate enough power to run it. if you follow, so when the aircon is on it sacrificial to the power output. I am no mechanic by any means but I think thats how it works.