On 08/03/17 18:54, charles wrote:
In article ,
Another John wrote:
In article ,
Tim Watts wrote:

On 06/03/17 09:45, tim... wrote:

[1] my own figures for when I ran a diesel was 66 mpg on long runs,
32 mpg for town driving - this predated turbo diesel, the addition of
which makes the numbers a bit closer

My car is horrible around town (26 mpg) but I have a run to Devon next
month so that should be interesting.

I'd like to know speeds, when people quote MPG. It's very hard (I find)
not to do 80-85 on motorway runs (which are the favourite for good MPG).
The higher speeds would surely negate MPG gains?

while the engine might like you doing 80mph, the wind resistance goes up as
a square function, so is considerably greater at higher speeds.

So do the new proposed fines

http://www.express.co.uk/news/uk/776...xt-month-April


(I'm not getting better than about 52mpg on the 300 mile run to Kent
from 't'North.)

John



--
Future generations will wonder in bemused amazement that the early
twenty-first centurys developed world went into hysterical panic over a
globally average temperature increase of a few tenths of a degree, and,
on the basis of gross exaggerations of highly uncertain computer
projections combined into implausible chains of inference, proceeded to
contemplate a rollback of the industrial age.

Richard Lindzen