Just purchased a 03 S2 got 375 kilometers to the tank with 91 octane gas. Car has 113000 kilometers on it.
Any suggestions how to improve gas mileage.
Changed the spark plugs recently with Honda denso oem plugs.

 

Give us MPG, this KM/miles per tank is useless.

If you want better mpg be light on the throttle. Stay below 4k.

 

375 * .62 = 232 miles

Pretty normal if you're driving really hard and mostly in the city. I will usually get 250 (403km) per tank regularly.

I got 220 to a tank at WTD.

 

Shifting at 4000 rpm, no serious v-tec driving.
Any good aditives on the market? Example.... Sea foam?
Suggestions.....

 

Lol I get like 200-210 miles per tank on my 02. Just take it easy on the throttle and you'll get good mpg. City driving kills your mpgs.

Other than that, just make sure your oil is okay, and check the tire wear/pressure. If it is worn on one side excessively, get the alignment checked.

It's a sports car man... If you aren't going to Vtec then buy a Miata, because that is essentially what you'll have if you shift below 5.5k.

 

Have you done a compression test? You only have like 70k miles on the car.

 

If gas consumption is a big factor, you shouldn't buy a sports car. I bought my car to enjoy it, not putt around everywhere to get the best MPG.

No aditives will help, the only thing controlling gas consumption is your right foot.

 

I do about 95% city driving on my 04. My last tank averaged 23 MPG. That's not terrible I'm my book

 

375 km (233 mi) is perfectly normal for an S2000 driven in the city. If you want more, you'll have to do something like drive on the highway for an entire tank.

 

get all the junk out of your trunk. more weight = less miles per gallon