Poor gas mileage on my 97 honda prelude?

For some reason i've been getting pretty bad gas mileage on my 5th gen 1997 prelude. I bought the car about 3 months ago and i've noticed i waste way too much gas i really don't know what it could be i've been told to check the o2 sensor but i don't know how to do that or what to even check for, any help will really be appreciated

If you've got a jack, jack up the car and look just before your catalyic converter and just after it. There will be your O2 sensors. If your not sure when the last time they were replaced its a good idea to replace them. Not very expensive (I got 2 top of the line for $90) and its simple as unscrewing the sensor and disconnecting it and screwing in and connecting the new one.

Maybe it needs a tune up, check the spark plugs, check the oil, check your tire pressure

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