Gas Milage Question
#26
RX-7 Alumni
Fuel Mileage
My 85 12a was getting about 18-23 mpg and about 270 - 330 miles per tank.
My 84 13b is a little lower in mpg but not much.
Not bad considering it's a rotory engine--I know I'll have to clarify that one. These engines--1st gens--get mediocore to bad fuel economy for the size of vehicle--as compared to a well made pistion engine. I think they should be in the 28-32 mpg range. Remember the piston engines have had many more years of R+D to get the most out of them.
Fortunately the new Renesis engine has made major improvements.
Scott
My 84 13b is a little lower in mpg but not much.
Not bad considering it's a rotory engine--I know I'll have to clarify that one. These engines--1st gens--get mediocore to bad fuel economy for the size of vehicle--as compared to a well made pistion engine. I think they should be in the 28-32 mpg range. Remember the piston engines have had many more years of R+D to get the most out of them.
Fortunately the new Renesis engine has made major improvements.
Scott
#29
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I get 380-400 miles per tank 27.5 mpg on a 85 12a stockport while averaging 70 mph on fairly flat rural roads over a 800 mile trip. I use premium 98 oct fuel. I get about 20 miles less using standard fuel. If I drop down to a 60 mph average fuel consumption drops to about 32mpg. This is ideal driving, my best was 800 miles with only four stops, one for fuel, a red light, a stop sign and waiting on the car ferry!
Driving only in the city it drops down to 280 miles per tank 19.5 mpg.
I have to log mileage and fuel consumption for tax purposes so these figures are accurate.
Driving only in the city it drops down to 280 miles per tank 19.5 mpg.
I have to log mileage and fuel consumption for tax purposes so these figures are accurate.
#30
Originally posted by eddierotary
no im right, i have right now the chilton big book and it said that im right 79-83 is 14.5 and 84-85 is 16.4
no im right, i have right now the chilton big book and it said that im right 79-83 is 14.5 and 84-85 is 16.4
#31
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Mine hovers right around 20MPG with a high of about 22MPG. 84 SE, 86K, stock. I practice spirited driving, unless I'm auto-xing - then I drive it like I stole it.
#32
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In looking at a change in specification its important to look at the model year not the year it was manufactured. The 84 model was being sold during the last 4 months of 83.
#33
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Originally posted by eddierotary
no, all 84-85 rx7's came with 16.4 gal tanks the 79-83 came with 14.5 gals
no, all 84-85 rx7's came with 16.4 gal tanks the 79-83 came with 14.5 gals
Originally posted by 82transam
wrong, I'm not sure when they switched tanks, I think all FB's have the larger tank, but I'm not sure, my 83 has the 16.4 gal tank, the haynes manual says when they switched, but I don't have it handy.
wrong, I'm not sure when they switched tanks, I think all FB's have the larger tank, but I'm not sure, my 83 has the 16.4 gal tank, the haynes manual says when they switched, but I don't have it handy.
Originally posted by eddierotary
no im right, i have right now the chilton big book and it said that im right 79-83 is 14.5 and 84-85 is 16.4
no im right, i have right now the chilton big book and it said that im right 79-83 is 14.5 and 84-85 is 16.4
Originally posted by 82transam
Then the book is wrong, everything i've read says 83 is 16.4 and I've put over 16 gallons in on several occasions when I was low on cash, so its definatly got a 16.4 gal tank, not sure about previous years.
Then the book is wrong, everything i've read says 83 is 16.4 and I've put over 16 gallons in on several occasions when I was low on cash, so its definatly got a 16.4 gal tank, not sure about previous years.
79-80: 14.5 gallons
81-82: 16.4 gallons
83: 16.6 gallons
84-85: 16.4 gallons (carburated AND fuel injected)
Now who is right?
#34
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How are you getting 18-25 in the city? What have you done to your car to do this? I have a 85 GS stockport 12a w/out rats nest and stock carb and exhaust, and I am getting about 14 mpg in the city and don't drive it to the redline all of the time.
Chris
Chris
#35
ok so basically no one knows what size the tanks are, all i know is my 83 S has taken over 16 gallons so its somewhere around there. whatever its really nothing to argue over. Oh yea, yesterday a friend and I took the S on a two hour (each way) trip to pick up some parts for a ratty *** camaro hes working on. Anyway, it was 99% highway and I got almost 26mpg, I was very impressed.
#36
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Originally posted by 82transam
ok so basically no one knows what size the tanks are, all i know is my 83 S has taken over 16 gallons so its somewhere around there. whatever its really nothing to argue over. Oh yea, yesterday a friend and I took the S on a two hour (each way) trip to pick up some parts for a ratty *** camaro hes working on. Anyway, it was 99% highway and I got almost 26mpg, I was very impressed.
ok so basically no one knows what size the tanks are, all i know is my 83 S has taken over 16 gallons so its somewhere around there. whatever its really nothing to argue over. Oh yea, yesterday a friend and I took the S on a two hour (each way) trip to pick up some parts for a ratty *** camaro hes working on. Anyway, it was 99% highway and I got almost 26mpg, I was very impressed.
#38
If you are looking for a car that will get you to work cheaply then any year rex is not your friend. Go buy a hundah for the mileage. If what you are looking for is a fun car to dive in to corners with then the obvious choice is an RX-7. So now that I have vented I can go back and pretend that gas is cheap and my rex runs on a wet rag as we would all like to dream about O.K.
I am a rex driver and I am CANADIAN!!!!!!!!
I am a rex driver and I am CANADIAN!!!!!!!!
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