Join Date: Mar 2008
My Motorhome: A Caravan of all things !!
Thanked 525 Times in 447 Posts
The chances of improving your mpg with a remap are fairly remote.
Basically a remap (note NOT a rechip) will increase the engines torque and BHP to better suit the way your engine is used. the major problem being that if you have extra power available its VERY tempting to use it and that will impact on your mpg figure.
I would suggest that you see if you can modify your driving style a bit in order to reduce your mpg.
Look much farther ahead so you can anticipate what is going on so you do away with braking and accelerating unnecessarily. Likewise dont zoom up to traffic lights, lift off much earlier and try to NOT come to a halt as pulling away from rest uses much more fuel than if you are still moving. DONT accelerate hard, use a light right foot and slowly build up speed through the gears.
Dont think cruise control will give you the best mpg either, it wont. The reason being that you set the speed and CC will use as much power as possible to KEEP you at that speed, knock it off when you come to a hill and left your speed bleed off a little, you wont notice any difference in the time it takes to get to your destination but you will notice an improvement in mpg.
Keep your speed down. The difference in mpg between 50 and 60mph really is amazing. Air resistance increase by the square of your speed and its air resistance is huge on a motorhome. Some years ago I had a hymer b544 on a FIat base. One day on a loooong downhill section of a French motorway I tried an experiment. If I knocked it out of gear at about 60mph I could actually FEEL the MH being slowed by air resistance, once I got to about 50 the speed stayed the constant (even though on a slight downhill slope) I tried it a couple of times with the same result. That convinced me to cruise at about 50 rather than 60. Over a months holiday I really noticed that I was not having to refuel so often.
Use as little throttle as possible, and stay in as high a gear as possible WITHOUT having to use too much throttle. When on a long straight slowly lift your foot off until the speed drops slightly. If you have a constant mpg readout on your dash look and see how much just a tiny bit of extra throttle makes your mpg fall of a cliff!!
Dont carry anything that you dont need ESPECIALLY on the roof !!! If you have your fresh water tank full thats about 100Kg or another passengers worth of weight!
It is truely amazing just how much of an impact the above tips can have on your consumption.
I ran an Autotrail 4 tonne beastie on a 316CDI Sprintshift base and regularly got 29-30 mpg. By going much over 50 it dropped to 22-23 !! Yes really!!!!!
I never felt the 316 CDI was anything other than more than adequate when it came to power, and the mpg figure was acceptable especially when taking into account its size.
What sort of mpg are getting at present???
Its not the destination that matters.
It's who you share the journey with (even if like me, itís in a caravan!)
I am very fortunate to have Mrs Plodd to share mine with
Last edited by Mrplodd; 16-11-2015 at 13:55.