Target Reached 70mpg!

greenman7

I have reached my target – my combined fuel economy has reached 70mpg (in my Citroen C3 1.4 Hdi). I did this by adding Dipetane fuel additive (bought on ebay) to my diesel. When I use this more it apparently cleans the system and becomes more effective increasing mpg.

With the average fuel economy combined mpg for all UK cars being 37.837 if this was doubled imagine the cutting down of pollution and greenhouse gasses. Surely the top priority is for manufacturers to make more fuel efficient engines and to be able to make existing engines more efficient.

Conor_3

Snake oil. This page destroys their entire argument:
http://www.dipetanedistribution.co.uk/html/haulage.html

I have, in 15 years of driving artics at top weight, ever got fuel consumption that low. Ever. Even running double deck 15ft 9in high fridge trailers which are the most heavy fuel hitting ones, it never got below 6.5MPG. I have also yet to find a haulier that uses it and with fuel being the biggest expense, surely they would if it was what it claimed?

And note the dates. 1992. Fuels have come on considerably since then as has engine design.

I expect that like most people who find such improvements that its more down to a subconcious change in your driving style.

This is what I get out of a 2L Mondeo TDCi on best quality Tesco diesel and I don't drive like a nun. On a run I've had the average over 60MPG. So to achieve 70MPG on an engine 2/4 the size and a lighter car whilst deliberately aiming for high MPG doesn't sound impossible even just filling up from Asda.

daveyjp

70 from a C3 should be possible with no additives

My dad gets mid 60s from his Fiesta 1.4TDCi (same engine as C3) on motorway trips without trying and no snake oil.

Aygo diesel owners (same engine) have achieved nearly 90mpg by driving very carefully.

anewman

I often read about millers diesel power sport being a good diesel additive.

anewman

Conor wrote: »

Snake oil. This page destroys their entire argument:
http://www.dipetanedistribution.co.uk/html/haulage.html

The "baseline test" section makes it look fabricated to me. Just by chance the test group happens to be 0.22mpg less at baseline, pull the other one.

tomstickland

How can cleaning a fuel system improve mpg anyway?
As long as the fuel is metered correctly it doesn't know whether it's flowed down clean pipes or dirty pipes.

Surely the top priority is for manufacturers to make more fuel efficient engines and to be able to make existing engines more efficient.

Engines are already very efficienct. It's the size and weight of the cars that's the problem. Compare, say, a 1994 Polo at 750Kg with the current equivalent which is probably 1,100 Kg.

greenman7

70 from a C3 should be possible with no additives

My dad gets mid 60s from his Fiesta 1.4TDCi (same engine as C3) on motorway trips without trying and no snake oil.

Yes I did get 70mpg once - motorway driving on a long run. But my mpg in urban and semi- urban driving has been stuck around the 65-68mpg, with the additive I have hit 70mpg. I will see if this happens consistently and report back. It is good to hear of other people returning high mpg - I suppose I always try for a bit more!

Conor_3

TBH if you've been getting 65-68MPG normally without it, it's perfectly reasonable to expect to be able to hit 70MPG with a bit more care.

The problem with these kinds of additives is it's a self fulfilling prophecy due to the placebo effect. You are convinced it'll make it better so subconciously you take actions that bring it about as you want to believe it does what it says it will.

banger9365

i agree with conor and i have not seem any artic that i have driven below 6/7 mpg with 44tonnes on(average mpg).
and if you can get 65+ with a car it do's not take much to reach 70+mpg just by driving a little more carefull

greenman7

The problem with these kinds of additives is it's a self fulfilling prophecy due to the placebo effect. You are convinced it'll make it better so subconciously you take actions that bring it about as you want to believe it does what it says it will.

This is the first car I have had suffering from the placebo effect!?! In a typical (work)day driving yesterday I covered 70 miles in 8 hours stopping off 14 times at shops, car parks and several different client's houses. If I drive more carefully or hang around I will never complete my day! In the 10months since I have bought this car I have monitored the mpg using the brim to brim method and this is the first time I have reached 70mpg local driving.If I am using the placebo effect I want more of it and maybe I will get the same mpg as some Aygo owners - 90mpg

kaya

im amazed at how many people believe that the manufacturers MPG indicators are a good unbiased represenation of fuel economy, has anybody contacted a manufacturer yet to find out how accurate those gimmicks really are? My friend has a corvette Z06 (505 hp, 193mph v8), on occasion the economy meter reads "average 76mpg"
is there anybody here who believes that is possible as well?