Hey i have a 1990 prelude si with over 170000 on it and it eats gas really bad. I get almost 200 miles to the tank. which is killing me. tried gas cleaner changed plugs and wire. not cap and roter yet working on that. changed fuel filter tried sea foam not sure what else to try any more. All i know is that a need better gas milage cause it cost alot to fill up 2 to 3 times a week when im not going far to begin with. so thanks in advanced for any advise i know little about car so any thiny will help

 

Fuel leak ? .. check the feed and return fuel lines from one end all the way through to the other end .. look for wet/punctured hard lines, cuts in rubber fuel hose lines, for any leaks at fuel filter and fuel rail.

Any check engine codes ?

 

we dont beleive there are any leaks we checked and dont smell any gas either. no check engin light either

 

Try changing your o2 sensor. It should be
like 40 bucks for a 1 wire

 

I can't offer much advice, but definantly something amiss. I get 350-400 miles / tank. Hope you find the problem and resolve.