Maintaining at 50 mph over a three hundred mile trip 34 to the gallon

same engine as Alan

 

If onboard computer is to be believed, 31.5mpg @ steady(ish) 55/60 mph over 1500ml tour France/Spain, no tolls, motorway and normal roads inc.
Same engine.
Flyingpig

 

100bhp 2.2litre

last trip (120 miles mixed B roads and motorway) on board meter said 40mpg but actual was 32.5.

Bob

 

A modern engine has a sophisticated engine management/fuel delivery system and yes, if you are on overun (foot off downhill for example) your fuel consumption is indeed ZERO !!!

The engine doesnt NEED any fuel so the ECU makes sure it doesnt GET any !!

Petrol engines are exactly the same.

My 2007 Autotrail (400Kg) regularly returns just over 30mpg if I keep the speed down to 50-55 (If I have the Smart car and trailer on the back it drops down to 25.4mpg)

Due to my MAM I SHOULDNT exceed 50mph) but max torque is at 2000 RPM and that is 56mph (according to sat nav not speedo) and 56mph is the speed that the "Extra urban" fuel consumption is calculated at :wink: :wink:

So the simple trick to best mpg is travel at 56mph in top gear with as little throttle as possible. Dont rely on cruise control to give you the very best mpg because when you get to a hill CC will try hard to maintain the set speed and increase throttle opening (and fuel consumption) in an attempt to maintain the set speed. drop out of CC and let the speed bleed off a little, that will give you better mpg in the long run. also dont knock it into neutral on downhill slopes (yes some people do actually do that Bloody dangerous!!) for the reasons given above. Simples !!

 

10mpg on the hilly bits, but that's LPG prices so roughly equivalent to 16mpg on petrol, much better on the level when we manage a huge 16mpg or 25mpg equivalent.

Why worry about it? Fuel is not the biggest expense in running a MH for most of us, it's all the other stuff like insurance, tax and ferry charges.

Look: I know that not all can just ignore fuel prices, but it seems that there are more important things to concern us these days.

We've just had a delivery of new transformers this morning that have been extensively trashed in transit. They were for a job to go out on Wednesday, now we have lost £12k of turnover this month, now THAT is worth worrying about.

Peter

 

100bhp 2.2litre

last trip (120 miles mixed B roads and motorway) on board meter said 40mpg but actual was 32.5.

Bob

How did you work that out then Bob

 

MPG

Fiat Ducato 1.9TD 25MPG, Up hill, headwind, full tanks = 12MPG

 

This is another objective "all in the mind" kinda result.
I can get 30+ when taking it real easy. But drops to 23 towing a car.
So I guess somewhere between those number is average.

Ray.

 

Probably by noting how many miles he had done between filling to the brim twice and dividing the number of miles driven by the number gallons actually used :roll:

Even allowing for the known optimism of on board computers that does seem a big gap Having said that my computer and calculator agree with each other to within a few tenths of an MPG

I try not to be too paranoid about MPG but strive to get the best I reasonably can.

I suppose its not that much of an issue for those who only do 3-4k miles a year but I regularly do 8K+ so a few extra M's per G represents a good few quid !!

 

I get between 19 and 28, but being a Hymer 2.8jtd (all the aerodynamics of a concrete block) I am happy. strangely I get better economy while in France, probably better road surfaces and less traffic ?

curlyboy

 

I average 26mpg on my 3.0L engine. speed depends on traffic and limit.

cabby

 

I've not ben too happy with my MPG (23ish) but recently discovered the brakes were binding slightly. Being a very capable DIY mechanic I decided to service the calipers, something I've done upteen times on other vehicles. I started by getting the trolley jack out only to find it needed topping up with hydraulic oil but I hve none in my garage - annoying.

Next I went to undo the wheel nuts only to discover they were seized and even my electric impact gun would not release them. I eventually managed to release four out of five using a long wrench but the fifth one snapped off! Rather than buy a new hub I decided to see if I could drill and tap out the broken stud, but first I had to order the right size tap, the right size drill bit for the tap, and an allen key to remove the caliper.

I started drilling a pilot hole in the broken stud but just as I was about finished the drill bit snapped off leaving the flute firmly inside the hole! I've now got to remove the hub to see what, if anything, I can do to recover the hub, but to do so I've had to order the correct size socket.

This is getting to be a costly job and I haven't even got to inspect the caliper properly yet and haven't even looked at the other side or the rear brakes!

Please cross you fingers for me that it goes okay from here!

 

I don`t really care about what mpg motorhome gives. It is the unpriceable pleasure that it gives is what counts.
Dave p

 

100bhp 2.2litre

last trip (120 miles mixed B roads and motorway) on board meter said 40mpg but actual was 32.5.

Bob

How did you work that out then Bob

Started with a full tank, refilled it when i got home, divide miles done by gallons used. Simples

Bob

 

As a couple of people have already said the only accurate mpg figure is achieved by doing fill to fill tank top ups and recording the mileage between top ups and then do your own calculation, even then probably only an indication as most speedos are less than totally accurate.

The "computer" will only ever be an optimistic suggestion.

 

Over 8000 miles in the last 12 months 23.85 mpg. Not too bad for an 8.2. metre tag axle loaded with kit for 3 or 4 months at a time.

Mixed driving - French Alps, Italy, Greece and the UK.

I too always seem to see an improvement when in France. Apart from there being less traffic I suspect the road surfaces have less rolling resistance than ours. Strangely, in France I have never managed to put in more than 62 litres while in England I have managed 70 litres plus on many occassions.

I could probably manage to achieve 25 mpg but would probably be holding up the traffic. We normally travel at around 55mph except on long motorway journeys when we aim to be nearer the 60 mph mark

 

I don`t really care about what mpg motorhome gives. It is the unpriceable pleasure that it gives is what counts.
Dave p

I agree - the other thought is if you have to measure it you probably can't afford it!
However on a return trip to Spain this year Taffy a 1999 3.0l starline Hymer returned 9.5m/l ( for those still buying in gallons = 26.125mpg) and that included a week of touring around the Pyrenees.

 

best way

i find this the best way

http://www.fuelly.com/

 

I've not ben too happy with my MPG (23ish) but recently discovered the brakes were binding slightly. Being a very capable DIY mechanic I decided to service the calipers, something I've done upteen times on other vehicles. I started by getting the trolley jack out only to find it needed topping up with hydraulic oil but I hve none in my garage - annoying.

Next I went to undo the wheel nuts only to discover they were seized and even my electric impact gun would not release them. I eventually managed to release four out of five using a long wrench but the fifth one snapped off! Rather than buy a new hub I decided to see if I could drill and tap out the broken stud, but first I had to order the right size tap, the right size drill bit for the tap, and an allen key to remove the caliper.

I started drilling a pilot hole in the broken stud but just as I was about finished the drill bit snapped off leaving the flute firmly inside the hole! I've now got to remove the hub to see what, if anything, I can do to recover the hub, but to do so I've had to order the correct size socket.

This is getting to be a costly job and I haven't even got to inspect the caliper properly yet and haven't even looked at the other side or the rear brakes!

Please cross you fingers for me that it goes okay from here!

Should have took it to a garage :roll:

.... and the 3 Fiat based Autotrails I've owned have all been faulty because I can never get near your MPG figures! (not that I'm bothered)

 

A modern engine has a sophisticated engine management/fuel delivery system and yes, if you are on overun (foot off downhill for example) your fuel consumption is indeed ZERO !!!

I have on occasions coasted on downhill sections in the belief that I would save fuel. However the fuel economy is zero on the overrun as against the fuel used to maintain tickover when coasting.
Source of information is the excellent "honest john" of the Daily Telegraph.
http://www.honestjohn.co.uk/askhj/answer/34185/coasting-in-neutral---bad-for-economy-

I never coast anymore but mainly for safety reasons not fuel economy.
Mike Evans

 

mpg

Like this

 

Did our first real trip to France and our AutoTrail Tracker with a 2.3Lt did about 30 mpg over 2,430 miles mixed roads trying to avoid French toll roads.Took it easy 2000 rpm about 55/60 mph.

 

So far on 6500 miles average fuel consumption 30mpg.
travelled mostly on motorways at 90kmh or 56mph.

lowest trip 27mpg. highest 32mpg.

I use cruise control, the OH does not like using it.
2.3 130bhp Euro 4 Ducato engine.

Dash computer runs approx 1.5mpg low!!!!

 

I don't know if this might serve as a bit of a benchmark for some.

I have a 57 Citroen Relay XLWB with the 2.2 120bhp transit engine, on a run from Leeds to Manchester at motorway speeds it showed 37mpg, to day we went to Huddersfield at A road speeds and it showed 35.3mpg.

The van is a still a van except for the Sietz windows and roof gubbins Solar, Heki etc and has no furniture or appliances in yet.

It might show how your extra hab contents ad to your fuel consumption, I anticipate a drop of 2-3mpg once it's fully fitted out.

 

How does everyone get much higher MPG figures than me?

I reckon we get between 20-22 MPG. 1996 Kontiki Peugeot Boxer 2.5 TD.

I do try to keep the speed down but on motorways which we are not often on I usually end up creeping up towards 65/70 mph.

Mind you it doesnt really bother me as we seem to measure our costs in monthly figures now and as long as its under £1000 Im happy. In fact this year its been cheaper than ever thanks to the better exchange rate but despite higher fuel costs. Got diesel at €1.30 today in Super U at Saintes.

I wonder if having a scooter on the back makes a difference although I dont see why it should as its behind the van and we are not overweight. Maybe its just the older less effecient engine.