yammo7013

well ive been thinking about my gas mileage.... i have a s5 TII and i fill up about every week like every friday and i get 210 to the tank if a lil more or less depending on how i drive now is that normal or should i look into something?

Aaron Cake

iTrader: (1)

Seems about reasonable. These cars tend to get about 15-18 MPG in the city.

But, when is the last time it has had a tuneup? Is the car properly entering closed loop? When is the last time the injectors were serviced?

yammo7013

Im not to sure bout the injectors but I have done the spark plugs and wires fuel filter etc but should I still look into getting them serviced?

Rotank

iTrader: (2)

Its rotary, and its turbo. Turbocharged cars drink fuel.

yammo7013

Lol kk thanks I was jw

Evil Aviator

How to determine gas mileage:
1. Fill up the tank completely, set the trip odometer to 0.
2. Drive normally.
3. When you need gas again, fill up the tank completely. Record the amount of fuel used and the mileage on the odometer. (I just write the mileage on the receipt).
4. Calculate the gas mileage by dividing the miles by the gallons. For example, 204.6 miles / 11.893 gallons = 17.2 mpg.

The EPA estimated gas mileage for an 1989 RX-7 TII was 16mpg city and 24mpg highway. The current revised numbers are 15mpg city and 22mpg highway.

Things that cause bad gas mileage:
- Tires not inflated correctly or tires wider than stock.
- Steering not aligned or other suspension problems.
- Carrying a lot of weight.
- Engine worn.
- O2 sensor bad.
- Leaky fuel injectors.
- Using ethanol-enriched fuel or "winter" fuel.
- Driving with the AC on or the windows down.
- Rapid acceleration.
- Driving over 55mph.
- Excessive idling (for example, getting stuck in traffic).

RotaryEvolution

iTrader: (30)

i get 23.5mpg, but the car is not running the stock ECU or turbo. is that considered bad?

cvzg77r

iTrader: (10)

lol I only get 200-220 miles out of my tank and i have a rx8 lol no matter how i drive it only once did i get to 240 mark and i was so happy and after that never happened again :/ that was the day i changed my spark plugs the last time lol hasnt been long at all than the motor went and mazda replaced them but new engine and i still get the same mileage now fuel pump is gone maybe that was the cause of my bad mpg?

yammo7013

thats actually exactly what i do lol

RotaryEvolution

iTrader: (30)

im not sure if the 55mph rule applies to these cars as well. i get the figure i gave while doing between 80 and 85mph, consistently.

Sonya Dlcw

I always drive fast

i get epa estimates AND drive a steep grade daily. these cars are magical. if my commute was flat land i could only imagine how much better mph i would get

Ultra300X

Heck I get 260 miles in the FD

azn_kenji

Does it really matter if we was to get gas from other cheap gas station instead of Shell? since Shell is known for having the best fuels???

Wortex

I have a 290hp Volvo s60 and it drinks like crazy 12L/100km, dont know how much it is in gallons/miles...

Andrew Petersen

Ya and considering in one track day drifting I go threw about 3/4 of a tank in my turbo 2 and the n/a gets 260km so 220km for your t2 ain't bad highway you will probily see 300km and I wouldn't use shell gas I haven't had anything good with shell every time I've gone there I've had issues with water in there fuel only run chevron in all my cars 94 octane get better millage with high octane fuel as well

misterstyx69

iTrader: (142)

about 20 mpg.
I dunno what I get,and I am afraid to know!
If I ever figured it out I would sell the car!

suck_my_rotor

iTrader: (8)

Sounds about right man lol. been hittin boost a lot?

yammo7013

lol mayyybbbee

pyrod27

iTrader: (9)

i get 320 out of my n/a now...im stoked!!!

Evil Aviator

The RX-7 was designed to cruise at 55mph, so unless the engine, gearing, and/or tire size has been changed, this is usually where it will find its best gas mileage. Parasite drag increases with the square of speed (when speed doubles the drag quadrouples), and an increase in drag causes an increase in power required, which decreases gas mileage. Therefore, even if the car has been modified to perform better at higher speed, it will still encounter the drag problem which will increase drastically as speed increases. Some older cars cruise best around 45mph.

Many of the cheapie fuels use ethanol to raise their octane rating, while the expensive fuels usually use aromatics. Ethanol has very little energy content, so it produces less power and therefore less gas mileage per gallon. Aromatics are more expensive, but they have a lot of energy content, and will produce more power and therefore more gas mileage per gallon.

The "best" fuels are usually determined by the detergents, which do not directly affect power or gas mileage. However, they do keep the engine cleaner which does affect power and gas mileage in the long run.
http://www.toptiergas.com/retailers.html

Phoenix Jones

iTrader: (1)

I get around 225-260 miles per tank, NA.

jdrex

mines gets about 13 -17

Clubuser

post #7: "...i get 23.5mpg, but the car is not running the stock ECU or turbo..."

that speedo.odo is screwed up...bet @ 85 actually doing 60!