Hi fuel comsumption

Geofff

Member
Hi again. Well, after driving to Dover, from Deal and back, (21 Miles) to refuel with LPG, I used approximately 13 Ltr's, (3 Gallon's) of Petrol. This, is too much!
My Engine, is a Chevy 7.4 V8, with an Auto box, (1994,.. 61000 miles) in a "Four Winds" C class. It has "Single point" Injection, on the Carburetor. Is there any thing I can do, to the Carburetor, (Change/ Service) to improve this? Is there a "Super Dooper" Carburetor out there? Has anyone improved their fuel consumption, on this type of Motor home? If so, what did you do?
I have taken as much weight out of the Vehicle, (About half a tonne) as I can. Is this high consumption, "Normal" for this Vehicle?
Any comments/advice, would be much appreciated.
Thanks,...Geoff.
 

onan

Subscriber
How do you know you used 13 litres of petrol?

Was this based on filling the tank to the top at the beginning of your journey and then refilling to the top at the same petrol pump 21 miles later? That’s the best way to accurately determine mpg.

Fuel gauges can be very unreliable as are mpg read outs.
 

chatter

Subscriber
No one buys these units with an eye to fuel economics, I suggest you take it to one of the specialists and get it all checked out/repaired by folk that know these units. Adie4 is at Weymouth, Daves American motorhomes at Cannock, Anglo-American Autocare at Newport Gwent, Duncan Starspangledspanner in lincolnshire and i believe there are one or two mobile guys out there no doubt one of the others can give details on them, and taking it for a decent run will give you a better idea of fuel consumption
 
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Geofff

Member
Thanks all. I did first think that I was getting about 10 MPG, but looked carefully at the fuel gauge, (I do appreciate, that this is not that accurate) so when I made this journey, I was disappointed. I do try not to use "mechanics" as they are just too expensive! I will live with it. It will only have to get me to Spain, (Around £600 for LPG) once there, I will not drive much, it is an acceptable cost, for a "One off" journey. (Not bringing it back, will sell it, after about 2 years).
Thank you all, for your input.
 

grumpy

Subscriber
Hi again. Well, after driving to Dover, from Deal and back, (21 Miles) to refuel with LPG, I used approximately 13 Ltr's, (3 Gallon's) of Petrol. This, is too much!
My Engine, is a Chevy 7.4 V8, with an Auto box, (1994,.. 61000 miles) in a "Four Winds" C class. It has "Single point" Injection, on the Carburetor. Is there any thing I can do, to the Carburetor, (Change/ Service) to improve this? Is there a "Super Dooper" Carburetor out there? Has anyone improved their fuel consumption, on this type of Motor home? If so, what did you do?
I have taken as much weight out of the Vehicle, (About half a tonne) as I can. Is this high consumption, "Normal" for this Vehicle?
Any comments/advice, would be much appreciated.
Thanks,...Geoff.
Just put the same post on travelling in RV, if your penny conscience, don’t buy an RV.
Also don’t forget American “gallon” less than UK, so depends on how your tank, gauge and speedo are set up, I assume?
Regards
grumpy
 

paul&debra

Subscriber
posted this in wrong thread.
used mine to travel from home to Dover about 30 miles, then through France to Holland up to Denmark, across to Sweden then up into Norway. Towing a trailer, full of food, water and 5 adults. back down into Germany across about half of Germany and back home. Used about £2500.00 of fuel. What holiday visiting 6 countries with 5 adults, can you think off, with accommodation that costs less.
 

chatter

Subscriber
I do try not to use "mechanics" as they are just too expensive! I will live with it. It will only have to get me to Spain, (Around £600 for LPG) once there, I will not drive much, it is an acceptable cost, for a "One off" journey. (Not bringing it back, will sell it, after about 2 years).
Thank you all, for your input.
Well good luck to you,
I for one would not undertake such a journey without having my vehicle mechanics and tyres checked by a mechanic that knows these vehicles, nor without certain spares ( belts, bulbs, tyre carcuss etc) do you have any idea of costs should you break down on route its eyewatering especially as you are over 3.5t no roadside repairs its a case of put you on the back of a wagon to go to a garage and you need to pay there and then.
If you should acheive the journey without mishap and enjoy your 2 years with it, why would anyone buy a motorhome that will needcostly transport on the back of a wagon to the uk due to not having been road legal for a couple of years should the person want to use it as it is meant to be used

Have you really thought things through, it would be cheaper to fly and rent apartments when you want (3 and 6 monthly rentals are reasonable) than drive and pay site/storage fees and still have to fly out assuming you will not be staying there 2 years yourself after brexit
 
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Arthur

Subscriber
Our first bus had a 7.4 Cummins & a record was kept religiously by the previous owner from new, which we continued. I think we sold it with about 20+k & it had returned just under 11 over the whole period.
Current bus has an 8.3 Cummins & records between 1.8 miles (Welsh & Scottish mountains) & 150 miles (that’s downhill) to a gallon but the average is around 10.
I’m pretty certain that short journey’s will record rubbish mpg.
 

adi4

Subscriber
Don't you just hate posts like this??? :oops::speechless:;). Someone on here told me they had a near identical vehicle to mine and were getting over 25 mpg. I can manage a "true" 14 mpg checked over three years of ownership. C'est la vie! :(:think::lipssealed:

It will greatly depend on how you drive the RV , with ours ( diesel pusher) crusing at 50mph will do up to 15mpg and 65mph it will drop to 11 to 12mpg.
And a petrol engine will show a larger variation in fuel consumption than a diesel with different load conditions (y) (y)
 

RV Neal

Subscriber
It will greatly depend on how you drive the RV , with ours ( diesel pusher) crusing at 50mph will do up to 15mpg and 65mph it will drop to 11 to 12mpg.
And a petrol engine will show a larger variation in fuel consumption than a diesel with different load conditions (y) (y)
Generally I cruise at 60mph (90kph) whether towing or solo. I use cruise control a lot. I'm probably running at or near maximum weight (6.5 tonnes) and the trailer can be up to a tonne, depending on what I'm towing. As has already been said I don't let mpg figures grind me down. This has been a lifestyle choice and I love every minute of it. After all, 14mpg is way better than 10mpg!
 
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