How to increase fuel economy?

[DarranJones]

Hi, I\'ve had my FD a week and fuel economy is crap as I suspected.

I drive about 20 miles a day (if that!) and each day I use about 1/8th of a tank of petrol. So, according to my calculations based on a 76 litre tank, I\'m using 2 gallons of petrol for that 20 miles. That\'s 10 miles a gallon!

Surely that can\'t be right? If I was ragging the f**k out of it everywhere I go I could understand it, but I\'m not.

Are there any things I can do to increase the fuel economy a bit? I\'d be perfectly happy with 15-18mpg for short runs.

Cheers,

Darran.

PS - Here\'s a list of the mods it has. You guys will know better than me which ones may affect economy.

Mazdaspeed MS-01 alloys
Mazdaspeed Type 2 spoiler
OS Geinken clutch
Mazdaspeed Lightened Flywheel
Mazdaspeed Differential (1.5 Way)
Bilstein Suspension
Mazdaspeed sport brake pads
Bridgestone Potenza 255\'s (Back) / 235\'s (Front)
Dual Cone K&N Air filter
HKS Downpipe
Mazdaspeed exhaust system
Silenced midpipe
Blitz blow off valve

[MikeLMR]

don\'t trust the fuel gauge, work out the miles between fill ups and how much you put in and do the mpg that way, I think you will be happier then

[Brett]

Having said that, what sort of journey is this 20mile one?  Is that 10miles each way?  If so it will have barely come out of cold start by then...

[DarranJones]

Yeah 10 miles each way. Seem\'s to get up to temp pretty quick though.

[Ricco_04]

I must admit, when I used mine for daily commute to work I was getting better economy than that - something around 17mpg.  Oh and I travel 6miles to work and back.  According to the stock water temp gauge the car is warm after 6-7 mins in 12 degree air temp.

HTH

[rx7veilside]

get a apexi ecu and have it tuned most stock ecus run rich that goes for all jap cars they seem to like it nice and rich in japan

[Martiny]

Mike is right - fill it to the brim, drive for a week, fill it again, and then measure it.
Fuel gauge is made to under-read to try and prevent you running out!

[t2rew]

or buy a metro  

[Bulla]

Your in the wrong car if your looking for fuel economy. Buy an old banger for a few hundred quid, its the only way !

[DarranJones]

I think a few of you guys have misunderstood what I\'m getting at.

I\'m not complaining that I\'ve bought an RX-7 and it drinks a lot more than my Saxo VTS did.

I\'m just wondering why my RX-7 only get\'s 10mpg for mixed motoring when it should really be getting 15mpg.

It\'s no biggy, I know my car\'s running rich on a standard ecu. I\'ll just have to put my hand in my pocket and get an Apexi.

Thanks to those peeps who made constructive suggestions  :cheers

Darran.

[Bulla]

The apexi will release a good few horses with the mods you\'ve got, and increase the economy. You\'ll have to resist giving it a good spanking on the way to work though !  :burnout

[dre]

has the car been recently serviced??

If not, then plugs and fuel filter should be top of your shopping list. Fuel filters can get clogged up giving you crap fuel economy.

Hope this helps.  :cheers

[bobster]

I use my FD as a daily driver and I think your fuel economy is about right/average for these cars....
If you do your 10 miles mostly in and around town then I\'d expect to see that return.
Personally I really don\'t mind the economy driving around like this.. in the words of Jim Kelly, \'I\'ll be too busy looking good\' ...

[rx7_bhp500]

Hi, I\'ve had my FD a week and fuel economy is crap as I suspected.

I drive about 20 miles a day (if that!) and each day I use about 1/8th of a tank of petrol. So, according to my calculations based on a 76 litre tank, I\'m using 2 gallons of petrol for that 20 miles. That\'s 10 miles a gallon!

Surely that can\'t be right? If I was ragging the f**k out of it everywhere I go I could understand it, but I\'m not.

Are there any things I can do to increase the fuel economy a bit? I\'d be perfectly happy with 15-18mpg for short runs.

Cheers,

Darran.

PS - Here\'s a list of the mods it has. You guys will know better than me which ones may affect economy.

Mazdaspeed MS-01 alloys
Mazdaspeed Type 2 spoiler
OS Geinken clutch
Mazdaspeed Lightened Flywheel
Mazdaspeed Differential (1.5 Way)
Bilstein Suspension
Mazdaspeed sport brake pads
Bridgestone Potenza 255\'s (Back) / 235\'s (Front)
Dual Cone K&N Air filter
HKS Downpipe
Mazdaspeed exhaust system
Silenced midpipe
Blitz blow off valve

LPG / autogas !!

[bin liner]

Here we go again another f@@kin economy thread.Aaaaaarghhh!!
Mate if it\'s bothering you enough to put a thread up about it then you\'re definitely complaining.

They all get 10mpg.Anyone getting 15 or 18 or 55 mpg is coasting it down big hills so here\'s a constructive post.Move to a hilly area with big f@@k off hills and coast the f@@ker down the hills and have your mates waiting at the bottom and then you and your mates can push it back up the hill.

Or sell it.
Or put up and shut up.
F@@kin 1/8th of a tank, have the fuel gauges even got 1/8th increment readings? wtf are you doing marking the f@@kin gauge with a pencil?

Get a life.