so i just got a 92 civic vx hatch. filled it up twice. got 35mpg the first time. then 27mpg the second.. so whats up with that. still has the same motor d15z1. any tips on what to do to get better mpg??

 

Your gas mileage will drop in very cold weather. Did you change your driving style or do you drive more city versus highway miles?

Is the CEL on? Does it take an abnormally long time for the engine to get hot?

When were your plugs, wires, cap, and rotor last replaced?

 

Did you change driving conditions? City, highway, combined?

 

i think i got better in the city. i drove to dallas on the highway. hole shot 75mph. thats when i got 27. i just changed the plugs. and what is CEL? this is my first honda

 

cel means check engine light, it will come on your cluster

try going 55 when your on the highway, windows up to reduce drag, and see what ya get

 

Driving 75 mph will reduce gas mileage. Try not to exceed 65 mph.

A D15z1 engine should be getting 40 mpg. You should also replace the plug wires, cap, and rotor, and check the ignition timing.

CEL = check engine light
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Is the engine warming up quickly?

 

Do a full tune up, your highway mpg will improve if you slow down a little.

 

ya it does warm up quickly. full tune up includes what? plugs, wires, cap, rotor, fuel filter, air filter, oil change, anything else to change? what about a new fuel pump. it did die on me today and it took awhile to get her back started

 

Yes, but replacing the fuel pump is probably unnecessary.

When you turn the key to ON(II), does the CEL turn on and then off after 2 seconds?

 

yes i think it does.