i got a 94 coupe, with a bodykit, and twice a month i need to drive about 3 hours to my girls college to see her. its aobut 200 miles or so (400 round trip, 800miles total per month). ive been posting up about 41 mpg on the highway on the d15b7. is there any good ideas that i can save even more gas? i got the tires to roll with 35 psi, slap the sulencer into the muffler once i go, and no spare tire in the turnk. damn bodykit killing the aerodymanics!!

 

Increase air pressure to 38-40psi (check the outside of your tire to make sure you don't go over the max), clean your intake filter, add fuel injector cleaner at every oil change or 3000 miles, go with 0w-30 oil, skinnier tires (running with the stock Civic size is better 185/65x14"), lighter wheels, wax your car, make sure your car is running in tip-top shape, make the underneath of your car flat (aka Lotus Elise), make sure you have 0 toe front and rear, and actually I would put your spare tire back in as it will level your car and make it more aerodynamic.

In my opinion without the spare the weight goes more onto the front of the car causing more drag.

 

hey guys post up what gas mileage u'll be having in the city or the highway, and what setup u have (car, motor, tranny, etc). i get 33 mpg occassionally with a 94 dx coupe, mods: CAI and muffler with some fancy plug wires

 

2000 Honda Civic Si:
Engine:
- A'PEXi WSII cat back exhaust, A'PEXi GT headers (painted and wrapped), Comptech Ice Box Intake, AEM Pulleys (red), Royal Purple 5w-30, Denso Iridium Spark Plugs, Redline Water Wetter, Sunoco 94 Octane, 19 degrees advanced timing, Type R painted valve cover, Billet Aluminum Oil Cap

Suspension:
- Koni Yellow Sports, Custom Rate Ground Control Coilovers (350f/400r) dropped 2" front, 1.75" rear, Comptech Rear Sway Bar/Tie Bar, Energy Suspension Bushings, Skunk2 Front Camber kit, Rear washer camber kit, Neuspeed Front Upper Strut Bar, Neuspeed Front Lower Strut Bar, Neuspeed Rear Upper Strut Bar

Alignment:
- 2.5 negative front, 1.5 negative rear, 0 toe front and rear
weight of car with 1/4 tank of gas - 2450lbs.

Stoppers:
- Brembo Rotors, Hawk HPS Front & Rear Brake Pads, Goodrich Stainless Steel Brake Lines, Valvoline SynPower Brake Fluid

Wheels & Tires:
16x7" Rota Circuit 8, 205/45x16" Toyo Proxes 4

I get about 30-32mpg highway, and 25-27mpg city


1989 Civic si
Engine:
stock

Suspension:
stock

Alignment:
stock

Stoppers:
stock

Wheels & Tires:
15x6" 2000 Civic Si wheels with 195/55x15" Nokian Hakkapelitta 2 snow tires

With this one I get about 35-40mpg highway and 30-35mpg city.

 

If you want to go the expensive route, you can get some form of air/fuel controller and lean it out in the cruise band. Not my fault if you blow up the engine though.

(86 RX-7, I/M/E, 17city/25highway h: )

 

You could add some fuel system cleaner or fuel injector cleaner as mentioned above. That would most likely help some.

I am getting 50 mpg on the highway driving too and from college - 1992 Honda Civic cx hatchback, tein ss... stock for the most part.

 

wow.. 50.. not bad at all... well its a hatch i guess... sometimes i want to take off my damn bodykit thats killing the aerodymanics!

 

I got 44mpg ATL-Richmond non stop with a D15B7 and a CX trans on a stock bodied '92 CX. Stock 13" steelies with 3 different kinds of tires on it and 2 different pressure ratings... and loaded down with another passenger and a weeks worth of stuff for 2 people. The car was full.

So... get a CX transmission. That will boost it. Just kiss performance goodbye.