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I have tried on occasion to stick behind a truck at 55 mph on a motorway. I know it makes a big difference and you will get better MPG but I usually last about 5 minutes before I floor it and pull out to 70mph. If I have 250 miles to go I just cant go at 55. at the end of the day 20mpg, 23 or even 27. Does it make that much difference?
Watch out for the green police!!!! In days gone by - no, but in these tougher economic times / high fuel prices its personally getting much more noticable - to put it into perspective, just for me to get to the ferry and back before my holiday even begins the difference between 20 & 27mpg is around Ł60 in beer tokens over the 960 miles, so Dave - yes that is correct. Thats 3/4 of a tank of fuel for me - or a full tank if I fill up on the other side at the moment.
Next time you are driving on a busy motorway at above 60mph getting plauged by the drivers that have to have their right foot on either the brake or the accelerator or hogging the middle lane , look to your left when you start off and note the trucks there then check again sometime later - you might be surprised what you find. The M6 between Warrington and Stoke is a classic bit for this.
Oh and incidentally, 10% extra weight can give an increase in consumption of around 10% - just something else to throw in the mix. The joys of being a transport manager, I have to deal with this sort of crap every day
Next time you are driving on a busy motorway at above 60mph getting plauged by the drivers that have to have their right foot on either the brake or the accelerator or hogging the middle lane , look to your left when you start off and note the trucks there then check again sometime later - you might be surprised what you find. The M6 between Warrington and Stoke is a classic bit for this.
Location: Bideford - a good place to test juddering Fiats and electric bikes.
Status: Offline
pauwilson wrote:
Watch out for the green police!!!! .....
So right
In the marine industry we have some very large diesel engines - some >100,000 hp from 12 cylinders
Because of their size but mainly resulting from recent technology advances , some clever things are done, such as
- sequential turbo charger operation, variable geometry turbochargers, multistage intercooling and exhaust waste energy recovery
-multiple fuel injectors, variable cylinder and injector number operation, pilot injection and variable start, duration and end of injection
-variable opening, duration and closing of exhaust valves.
- burning "fuel" that is crude oil that has everything useful taken out of it - ie the gunge that is left and that is therefore called "residual fuel"
- exhaust gas scrubbing
From the 1960s to the mid '90s fuel consumption was improved by over 25% but this has all but halted over the last few years as technology has allowed international marine regulations to require every demanding emission controls. These regulations are often implemented because of the votes of non maritime nations that do not have any significant merchant marine or in some cases, a coast line
If these requirements were set a more reasonable levels, immediate fuel savings of up to 15 % would be possible, which in the case of a 100,000 hp engine, would reduce the consumption by about 50,000 litres per day
No cheers for the green police
______________________________________________________________ Never let anything mechanical know you are in a hurry
Especially when a TV programme a few days ago revealed that cattle produce more greenhouse gases than all the motor vehicles on the planet . . . . . . and not from their exhaust pipes either, surprisingly.
I think the only way I would get 27mpg out of our van is down hill with the engine turned off.
I might get up to 25mpg if I really drive at 50-55 mph all day long. I know it makes sense what your saying and on none motorway roads I enjoy the drive and will just drive along within the limits. Its just motorways do my head in. I think it comes with years of belting up and down the UK in a hurry to get from one of the country to the other (in a past life). Boring!
I drive with my eye on the Tacho rather than the Mileometer. I change up from first as soon as i can and every other gear change is at 2000 revs. I also try and cruise at 2000 revs (traffic permitting, as i don't like to cause tailbacks) and this normally gives me a driving speed of between 55 and 60 mph.
My last van, a Fiat based 3,ton Low profile with 2.3TD engine (55000 miles) i achieved 35mpg on average and 37mpg at best.
My new van although a bit soon to give average figures i am looking at somewhere in the region of 32mpg to 35mpg. This vehicle is a Fiat based 4.5,ton Low profile with 2.8JTD engine (40000 miles)
This may all sound about anal, but for me every penny counts
John
I must admit that I do not normally monitor my MPG.
However on my recent trip to Ireland I did fill up to the brim and wrote down my mileage. On leaving Ireland I filled up to the brim again and noted the distance I had covered. So fairly accurate I would say. Now this really was a mixed bag of roads from Somerset to Connemara!
I did not rush although I do try to keep up with the flow of traffic.
There were four adults in my 6 birth Rimor (and two dogs) and in just short of 1000 miles I managed 23 MPG from my 2002 Merc 316. I was quite happy with that if I am honest!
Keep smiling
Keith
______________________________________________________________ If life seems jolly rotten
There´s something you´ve forgotten!
And that´s to laugh and smile and dance and sing!
Location: Bideford - a good place to test juddering Fiats and electric bikes.
Status: Offline
lebuski wrote:
My last van, a Fiat based 3,ton Low profile with 2.3TD engine (55000 miles) i achieved 35mpg on average and 37mpg at best.
My new van.....somewhere in the region of 32mpg to 35mpg. This vehicle is a Fiat based 4.5,ton Low profile with 2.8JTD engine (40000 miles)...
You might be able to help fund your meagure fuel costs by starting an Economic Driving School
______________________________________________________________ Never let anything mechanical know you are in a hurry
Location: Bideford - a good place to test juddering Fiats and electric bikes.
Status: Offline
KeiththeBigUn wrote:
I must admit that I do not normally monitor my MPG.
However on my recent trip to Ireland I did fill up to the brim and wrote down my mileage. On leaving Ireland I filled up to the brim again and noted the distance I had covered. So fairly accurate I would say. Now this really was a mixed bag of roads from Somerset to Connemara!
I did not rush although I do try to keep up with the flow of traffic.
There were four adults in my 6 birth Rimor (and two dogs) and in just short of 1000 miles I managed 23 MPG from my 2002 Merc 316. I was quite happy with that if I am honest!
Keep smiling
Keith
Keith,
Any notable performance changes to report since your fateful remapping in Exeter
Best regards,
______________________________________________________________ Never let anything mechanical know you are in a hurry
[/quote]
Keith,
Any notable performance changes to report since your fateful remapping in Exeter
Best regards,[/quote]
Hard to say on the MPG as I really do not bother keeping records but the performance is much better! No need to change down on hills at all. Very happy with it and even with the hassle I would do it again.
Keith
______________________________________________________________ If life seems jolly rotten
There´s something you´ve forgotten!
And that´s to laugh and smile and dance and sing!
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