M25 - moonstone 03 over took me

Julia · Post by **Julia** » Mon Aug 25, 2003 8:06 pm

Anyone here?

I was driving carefully obeying the speed limit because I was running out of petrol and had no idea where the next petrol station was!

Mr_AWOL · Post by **Mr_AWOL** » Tue Aug 26, 2003 12:12 am

Good excuse for ya granny driving Julia? Has that last birthday gone to your head?

Greenday · Post by **Greenday** » Tue Aug 26, 2003 12:14 am

Anyone here?

I was driving carefully obeying the speed limit because I was running out of petrol and had no idea where the next petrol station was!

Does petrol know when your breaking the law then?

Julia · Post by **Julia** » Tue Aug 26, 2003 10:43 am

I wondered if that would make sense!

What I meant was I was in the inside lane trying to look out for any "SERVICES" signs!
Oh and what I haven't worked out is this...

(Someone mentioned it when we had the petrol crisis)
They said they were driving slowly everywhere in order to save petrol.
Surely though the journey would take longer thus using more petrol!?
If you drive faster, yes you are using more petrol but then you get there quicker!?

Am I rambling?

stephen T · Post by **stephen T** » Tue Aug 26, 2003 10:48 am

i believe thet 55 or 65 is the most economical speed.

Greenday · Post by **Greenday** » Tue Aug 26, 2003 11:33 am

Its due to the amount of fuel you need to overcome the wind resistance, i believe Stephen is right as at about that speed it takes very little fuel and the car is carried mainly by its own momentum (unless your going on hill), i'm just trying to prove i learnt something in A-Level physics really

Julia · Post by **Julia** » Tue Aug 26, 2003 12:04 pm

Ouuu check you two!

Greenday · Post by **Greenday** » Tue Aug 26, 2003 1:00 pm

Forgot to mention i did fail the A-level, well never took the exams but i guess that's the same thing really

samwise · Post by **samwise** » Tue Aug 26, 2003 1:43 pm

A constant* slow speed gives the best fuel consumption but you obviously need a road where you won't get stopped (no juntions, traffic lights, etc). Here's the consumptions for a 1500 Spitfire

30mph 59.7mpg
40mph 55.6mpg
50mph 50.6mpg
60mph 44.9mpg
70mph 37.0mpg
80mph 32.3mpg
90mph 28.0mpg

So yes, if low on fuel, slow down a bit! Cheers

Jason

*Constant is OK on a flat road but you want to allow for a bit of slowing down on the hills and speeding up on the downhills.

Erm · Post by **Erm** » Tue Aug 26, 2003 4:49 pm

depends what the amount of revs you are doin........ 50mph in 2nd will consume alot more fuel than 50mph in 5th

Ben302 · Post by **Ben302** » Tue Aug 26, 2003 10:26 pm

My 306 DTurbo would go 550 Miles on a tank of Derv compared to the 360 I get out of mine sometimes. I tend to average between 38 - 40 mpg unless the Aircon is on