OBD Computers

Bollocks in the extreme.

 

They've recently added Spain & USA to the numerous countries they publish
in.

 

No idea and no, they're not.

I know fuel is getting quite expensive, but I haven't yet come to the
conclusion that it's worth driving slower to save a couple of quid over
a full tank of fuel.

I have a choice of cars on the drive - one does 45-50mpg, the rest do
around 30mpg - yet I very rarely take the one that does 45-50mpg for
personal use.

 

Mark Olson spoke:

*slightly* tongue in cheek, but in the 2 years I had it, irrespective of journey -
long-distance commute, holidays, cross-town heavy traffic, sitting in the M1 J8 to
12 car park, whatever, it consistently did around 19mpg.

--
Rob_P
UKRM(at)indqualtec.co.uk
uppercase(d) BBIWYMC#1 BOG#11? MRO#31 IBCDBBB#1(kotl)
FJ1200, CCM130 Benelli Cabriolet (gone)
Looks like Rab C Nesbit.

 

It doesn't really, if you're prepared to burn enough fuel to get a
reliable result by just doing each test with no other driving apart
from those tests.

 

By getting someone to note down the reading every second & how long it
takes to reach the target speed. Not totally accurate but if the
difference is consistently big enough over a few runs, it's good
enough.

 

Not even vaguely accurate, I'd say. You'd need to log MPG against road speed
during the acceleration, for a start, so you could work out the fuel used
over a given distance, and then a faster acceleration would mean longer
spent at VMax, so you'd need to take that into account as well. The only
representative way to do it would be to log fuel used over a given journey,
once with hard accleration, and once more gentle, so we're back to measuring
total fuel used and dividing it by trip distance. To get any real feel for
fuel used in transient conditions, you'd need a much more comprehensive
datalogger than a simple MPG readout.

 

Krusty spoke:

All he has to do is consciously drive different styles on his normal daily
commute, make some simple notes, and save himself the cost of a tank of
fuel by not buying a device of questionable value, quality, and veracity in
the first place!

--
Rob_P
UKRM(at)indqualtec.co.uk
uppercase(d) BBIWYMC#1 BOG#11? MRO#31 IBCDBBB#1(kotl)
FJ1200, CCM130 Benelli Cabriolet (gone)
Looks like Rab C Nesbit.

 

Things were simpler back in the day - a good vacuum gauge told you when
you could back off on the throttle and not lose speed and thus gain
economy.
Of course, with all the electronic shite on engines now, it's harder to
tell, but the same principle applies - back off and gain mpg.
It's surprising how little difference it makes to overall journey times
to accelerate less harshly and save a bit of fuel. As bike riders, we
get used to certain minimum acceleration levels and tend to drive cars a
bit harder than the average Joe (a wide generalisation, I know, but I
think it holds some water), and that's good.

Otoh, when doing long distance M'way trips in the UK, I consistently
found that my average including fuel stops was a miserable 55mph, so
hardly earth-shattering speeds involved, with a cruising speed of
80-85mph, just inside licence-retaining terrritory (assuming not too
much speedo error).

Otoooh, when driving the SOJC at the same speeds and acceleration as the
Tranny (which I don't hang about in), I consistently get 50% greater mpg
and more if I cba. To break 50mpg involves really driving like a gimmer,
and it's no fun at all.

 

That's what I have done. Drive like a gimmer, 34 mpg, drive properly,
28 mpg. I'm just trying to fine tune it a bit.

 

I (for my sins) had a fronterra as a company car for a while,
basically it always did 20mpg unless I was towing in which case it was
18mpg.

 

In the car I just fill up when the light comes on. I don't really give
a toss what the MPG is. I know it will be somewhere between 350 & 450
miles after the last fill, usually closer to the lower.

 

I care about the mileage in this car because it's car I only use for
work and more mileage means more profit.
I couldn't even guess what I get from the Eunos, or the bike because I
drive them because I want to.