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Fuel Economy

BlockLike said:
Decided to have a go at being a bit more conscious of driving habits to see how much difference a little effort could return.

The mpg wasn't bothering me at all, I just ended up curious.

With my general commute to work and local driving, I was averaging 18mpg.
My route to work is an 18 mile round trip and approx 70% of that is at motorway speed.
Outside of that, occasional local back and forth at 30-40mph.
Always use E5 petrol.
2010 E52 3.5.

I'm not particularly heavy footed and stick to speed limits, but do enjoy the odd little poke of the throttle from time to time.

So two weeks ago I set off to try different driving over two different weeks, resetting the fuel economy each time.

Week 1 - 18mpg
Drove no different to how i do normally

Week 2 - 24mpg
All i did was be a bit more gentle on the throttle. I'm not talking super slow acceleration, just not quite as hard.

Besides one or two small local drives, the miles covered were very close with similar weather conditions and traffic.

Might give it another go but have ECO mode enabled for a full week to see what kind of difference it makes.

This does make it promising for longer motorway journeys, of which i haven't had that many yet. Best I've done previously is 27mpg (ECO enabled) after a Newcastle > Leicester > Nottingham round trip.

But it does show that minimum effort can make notable difference.
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I've managed to maintain a steady 24mpg with my local day to day driving and commute, so I'm pleased with that.

Got some motorway journeys planned for holiday next month, so will hopefully see some even better figures with the same driving habits.
 
Richard. said:
Sorry I don't own the world's most economical Elgrand it was meant to be 7 km/l not 17. I wish it was though.
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At the moment I am getting around 8.3 Km per litre.
 
I can get 8km/L quite easily on a longer run with my 3.5 Elgrand running on LPG at 85p per litre, which costs less per mile than getting 12.2km/L and paying £1.30 per litre for petrol and costs less per mile than getting 13.1km/L and paying £1.40 per litre for petrol.

If I get 8km/L on LPG it costs me as much per mile as it would to run a diesel that gets 38mpg. I can refuel with LPG at home from a red bottle, have 700 mile range on LPG and never need to visit a forecourt. It still costs around the same as the missus' 1.2 petrol Corsa per mile on a longer run.

The Elgrand running on LPG is the perfect car for me, it is so versatile and ticks so many boxes... Carry 7 people with space for luggage, nice quiet smooth V6 engine, automatic gearbox, spacious, comfortable, has a decent turn of speed, cheap to run, massive range (700 miles on LPG plus 350 miles on petrol, not that I ever use petrol lol), didn't cost the earth to buy in the first place, reliable, a good tow car for my big caravan / boat, rear wheel drive with switchable 4wd for wet slipways (or snow or sloped wet grass).
 
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Not bad, not bad at all.
 
What is the deal with Japanese cars and awful MPG? My two loves are the E51 and the Toyota FJ cruiser and both seem to be terrible on fuel.. got me thinking on such a small island with small roads
 
LEMPM said:
What is the deal with Japanese cars and awful MPG? My two loves are the E51 and the Toyota FJ cruiser and both seem to be terrible on fuel.. got me thinking on such a small island with small roads
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Not sure man, wouldn’t call it awful, most cars from back in the day when I was a petrol guy, were anywhere around 30s mpg for 1.6L /2L engines and say estate or saloon bodies.

Elgrand is a big car and fJ is shaped like a brick with 4x4 if I’m not mistaken? Wouldn’t call it awful but adequate.

But in Jap in most cases people use smaller Kei cars to go about - 660cc so you have cheaper taxes, easier to park etc. big engines are only for wealthy and weekend getaways.

You can have 55+ mpg here in Fiat Panda with 1.2 engine
 
I got 9.3km/L on a run to Skegness and back yesterday running on LPG at 85p per litre which works out at 9.14p per KM (14.71p per mile) for fuel.

If I had run on petrol instead of LPG I might have got 10km/L but the fuel would have cost around £1.30 per litre which works out at 13p per KM (22.06p per mile) for fuel.

Did 200 miles (321.87km) which used 34.6 litres of LPG costing £29.41. If I had used petrol instead of LPG would have used 32.19 litres costing £41.85, so I saved £12.44 yesterday on less than half a tank of fuel. This was driving slowly due to the 50mph and 30mph speed limits on Lincolnshire A roads, usually I'd drive a bit faster and get a bit less km/L mpg so save more doing the same distance by running on LPG instead of petrol.

Last weekend when I towed my boat to Ullswater it was a round trip of around 240 miles (386.2km) getting around 6.1km/L on LPG so using 63.3L of LPG costing £53.80. To tow the boat the same distance on petrol I'd expect to get 6.7km/L so using 57.64L of petrol and at £1.30 per litre that would cost £74.93.

Regardless of the type of driving I do, e.g. slow economical cruising, stop/start driving, fast sporty driving or towing heavy stuff, £1 of LPG gets my Elgrand an additional 50% further down the road than £1 of petrol. This means that if I can directly compare my fuel costs to something that gets 50% better fuel economy, for example if my fuel computer says I'm getting 9.14km/L (25.82mpg) I know that it's costing me as much per mile as running a different smaller vehicle on petrol or diesel and getting 13.71km/L (38.73mpg). The missus' 1.2 Corsa might only get 38.73 mpg on the same run I did yesterday in the Elgrand, that's about the same as a mid sized diesel car might get, it's probably more economical than running a diesel van, the Elgrand is a comfortable 7 seater and a capable tow vehicle for my boat and caravan.
 
I put premium only in mine.

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My racing tractor does 41mpg in the city and 60mpg on motorway. Missus car is like 76mpg or something, mental.
 
The Elgrand gets great kl/l compared to my last stagea 😂🤣
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BlockLike said:
Approximate 10mpg improvement on the daily commute compared to when I first bought it just from being less heavy on the throttle and not using ECO mode.

Not bad
uoEsIHv.jpeg
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Every jap bus I’ve had has been the same.
Feather the throttle rather than “ press “ it and the ride quality is better and so is the mpg——- usually more power too as you don’t get indecisive responses from the lump or it’s brain, if that makes sense
 
BlockLike said:
Approximate 10mpg improvement on the daily commute compared to when I first bought it just from being less heavy on the throttle.

Also, not using ECO mode.

Not bad
uoEsIHv.jpeg
Click to expand...
It's an Elgrand not a Micra, it was built for wellying 🤣
 
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