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ROAD TAX RIP OFF!

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Range Rover Blues:
It's probably kicking down because you have to use more throttlepedal to get it to hold it's speed.  You could try an ignition advance processor if you can find one, it may give you better torque at part throttle.

As for multi point LPG injection, well I'm a big fan.  My LSE will pull a house over, it's a monster towcar and my biggest problem is when the trialer starts to sway, I can't feel it :-.

Wireless:
I've asked for a local quote for upgrading to LPG multipoint fuel injection from my existing venturi system, I have a K&N filter, and  am also considering a high lift cam and janspeed exhaust.  I've seen advertising for ECU re-programming, or ECU replacement, for towing, wasn't sure these actually were worth the cost.

If you had a venturi system previously, what is the difference in MPG for multipoint fuel injection, towing and not towing?

The figures will at least give me an idea.

Range Rover Blues:
Blue is still on draw-through, not even an electronic system.  It does maybe 12mpg on LPG but towing it really suffers and can't always hold 5th hear, on big tyres forget it.  Towing I can't say as I don't tow that far with it any more.

The LSE had a bust single point system on it when I bought it, it wouoldn't pull beyoind 2,000rpm.  I binned that and fitted multipoint.
On a bad day it does 9 1/2, it's got better with no cats and a sports pipe, K&N element in the airbox and iridium plugs.

the caravn doesn't make it much worse TBH, because I drive more sedatley with it on, but I can better 10 mpg on a run even at motorway speeds, the very best it will do is 12 1/2.

My sister had a multipoint 3.9 and reconed on 12mpg on LPG and 14-16 on petrol, hers was standard but a new engine with no cats.

Wireless:
Mmm...

Not towing mine does a 15mpg average, and up to 19mpg on a motorways, did tow a car on a trailer back from Scotland a couple of years ago, and averaged 14.5mpg.

Towing this new Scout Trailer loaded with furniture (it was there on my driveway), best I've had is 13.1mpg on motorways, and as low as 9.5mpg on twisty A-roads, not too worried about the mpg then.

I'm more interested in whether you're able to hold at 50-55mph in top gear on a motorway all day.  Kick down IS a pain in the proverbial, but if multipoint makes the engine more powerful it should reduce the frequency of experiencing kickdown on what I consider slight motorway inclines, it might improve mpg too.

The Ant Hill Mob:
Maybe RRB should've mentioned that the LSE is a 5 litre beastie.  And I have to remind him we have the caravan on the back, when he tootles along quite happily at 85mph on the motorway, WITH a stonking great big caravan on the back.  As long as you're not trying to tow the albert hall, you should be able to pootle along quite happily at 60 all day with a multi-point system.  As well as the multi-point system, you should factor in the cost of seat covers for when your other half / kids/ dogs poop themselves at the speed you'll go at when towing.

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