Fuel consumption on a Warwick Duo

I believe that using your engine at its max torque figure would be the most economical range to drive.
Mine is 300 ft lbs  at  1400 rpm. I usually cruise at 2,000 rpm.

Micky

I believe that using your engine at its max torque figure would be the most economical range to drive.
Mine is 300 ft lbs  at  1400 rpm. I usually cruise at 2,000 rpm.

Micky

I believe that using your engine at its max torque figure would be the most economical range to drive.
Mine is 300 ft lbs  at  1400 rpm. I usually cruise at 2,000 rpm.

Micky

I agree with 30 3rd, 40 4th etc, until I run out of gears, anyone know of a 8 speed box? 
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Richard
PS I normally never get out of 4th when going on local roads to Hayling beach, but still only average 27 on short runs with the van not loaded!

IanH wrote:
Don

Did an experiment this morning. 45mph in 6th is 1750rpm. As an aside that was 45mph on the very accurate gps hud speedo. The vehicle one was showing 41mph!

Thanks that's useful, I wasn't sure as I don't drive the van that often.
Assume you meant speedo was 51mph as they always (in my experience) read over.

On my 2017 van with the (I think) really good 160hp engine, 1,750rpm is maximum torque so I think that could very well be maximum efficiency.
We would need a BSFC chart for the Peugeot Boxer engine to be sure.

mikethebike wrote:Ian is that right? Your Van speedo is  under reading?

Micky

Micky
Thanks for pointing out the error
Typo, 45 ACTUAL GPS measured MPH was 51Mph on the speedo. It get worse with speed at 78 its actual doing 70.
BTW I think you, and my engine is 300Nm not 300FtLbs!
To all its been an interesting thread though.
Bw
Ian

Sorry 400N/m according to wiki.


Micky

Like so many our 2011 Duo, same engine but 120bhp gives me between 33.5 and 38 mpg.
A month in the Highlands of Scotland averages out at 33.5, six weeks through Spain/ Portugal 34 ish. A long trip on a motorway I can get 38mpg at 60mph. Road works forcing me down to 50mph improves to over 38mpg.
I tend to keep to no more than 60mph on motorway type roads and 50 in others.
I do change up through the gears as soon as possible and use cruise control on motorways or long straight stretches.

We load up with food, carry two folding electric bikes and travel with a full fresh water tank when traveling abroad or wild camping in Scotland.

Please don’t take this too seriously but it is a valid point IMO.

My girlfriend has recently had to have the DPF replaced on her 5 year old VW Tiguan at a cost of somewhere in the region of £500.
The primary reason given was that it had been driven without too much stress, giving it a ‘bit more welly’ at times would have probably prevented the failure.

My point being...driving a bit more sedately to save a few pounds on  MPG may not be best practice and could cost more in the long term.

re the DPF on a Boxer
"When driving on A-roads and dual carriageways, the temperature and pressure of the exhaust gases is sufficient to complete the process without any assistance."

source [You must be registered and logged in to see this link.]

That’s a fair point Don.

Unfortunately, I feel far too many leisure vehicles still don’t hit the revs required to regenerate.
Also, and possibly more annoying, DPF’s always seem to fail just outside of the warranty period.....

Following up on my earlier questions. I did run a series of brim to brim tests. In the next three thankfully I achieved.
Hull to Devon via Quantocks. 440 miles consumed 71L. 28.1 mpg avg most of the miles would be motorway.
Short journeys around Devon and into Cornwall, 402 miles consumed  77L, avg 23.5mpg.
Cornwall to various parts of Devon, shortish journeys, 468 miles consumed 73L, 29.1mpg.
Over the whole that is 26.97 mpg. In the same the trip on the van showed 26.7mpg overall.
That shows the van’s measure is reasonably accurate and the avg for the van is what I consider a bit poor on consumption.

Your 26.7 beats the 26.5 I mentioned earlier in the thread, which could be down to my permanently attached roof rack system.

It’s good to know your findings show the van’s readout to be fairly accurate.

If the mpg on ours is as accurate we have managed 36.5 over the 2 years we have had hetty. We have the 120hp engine.

Averaged 31 mpg coming from Bridlington via Buxton (Longnor) then over to the Wirral, didn't hash it.
Boaby on tour

My computer states 36.1 over last 3000 miles.

Based on all these wonderful figures you folk enjoy either my engine engine needs attention or the 130bhp version is the dog I suspect it to be

I not find any of the above figures to be in the real World apart from kingham and timedout, unless the others  cruise down hill with the engine off.

I always average 26-27mpg and that's even using toll roads in France at a steady 70, 99% of the time on cruise control.

Any way a van is for enjoyment and should not be spoilt over a bit of extra heavy oil being burnt, although with the latest prices I can understand why all the concern.

Another thing to take into account is your annual milage, mine works out at 4000.

Try looking at the readout when pulling away, 8mpg! or lower and that's not boy racing.
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Richard

A car will use 20% more fuel at 70 compared to 55, With a aerodynamic brick I would imagine the difference is greater. So 26 mpg at 70 could easily become 35 at 55.

rgermain wrote:
Another thing to take into account is your annual milage, mine works out at 4000.


----------
Richard!

This was exactly the point I was trying to make many posts back Richard.
My girlfriend pootled about trying to save a couple of MPG but then had a £500 DPF bill because of her driving habits.
Work out her MPG including that figure!!

Currentlyin Spain.
Have been on all conceivable roads
Have been at or near to the speed limit where possible, 88 in a 90kph, 118 in a 120kph for example
1000miles plus in Spain so far, ACTUAL fuel added to full, ACTUAL litres put in, 27.6mpg.
Not relying on cheap Changi watch vehicle computer, there only for those too lazy to do this properly!!!
This compares with the REAL consumption over 2 yrs and accurate measuring as above of 27.8mpg.
So,  there you are, I don't dawdle along at 45mph in 6th, probably the worst thing you could do to any diesel engine, mine has been between 2000 and 3000rpm the whole trip.

Timeout has already said that his computer is pretty accurate compared to his actual filling full to full, so why should my computer (whether cheap watch or not) be any less accurate.

Paulmold wrote:Timeout has already said that his computer is pretty accurate compared to his actual filling full to full, so why should my computer (whether cheap watch or not) be any less accurate.

I’ve done 6 trips since I bought my van and being an anorak have done ‘brim to brim’ calculations every time.
The vans computer has surprisingly been within 1mpg every time.

Dbvwt wrote:

Paulmold wrote:Timeout has already said that his computer is pretty accurate compared to his actual filling full to full, so why should my computer (whether cheap watch or not) be any less accurate.

I’ve done 6 trips since I bought my van and being an anorak have done ‘brim to brim’ calculations every time.
The vans computer has surprisingly been within 1mpg every time.

Exactly. But of course I'm one of those too lazy to do it properly. And I don't travel at 40 in 6th, in fact the van protests if I try but I don't floor it either. I happy to trundle when I can and try not to hold up a queue behind me. I'm retired, on holiday, so what's the rush.

As I explained at the outset. I do not drive hard. I use cruise control whenever suitable, drive at 60 on motorways, 50 or less on single carriageways. I usually see good consumption in our cars. I am an old man and I drive like one. A few years back I had a C220 estate. It was registered Nov 2011 which makes it contemporary with our van within a month or so. Fuelled up and loaded with the camping gear the C220 would weigh about 2000kg. Consumption on a bad day would be at least 55mpg. Ok the 7Gtronic box would change gear much more efficiently than me but there is a question I have to ask about the engine in this van. Is it just and old dog of a design? Or does it need attention? The folks with around 35Mpg are in an enviable position. If it’s possible, it’s what I want.