my 94 accord lx isn't getting the gas mileage i expect it to... I was up to 24 mpg at one point then last tank i only got 18.. I expect that the reason being would be that i seafoamed the car between fillups and my plugs got dirty... So i took the plugs out and cleaned them sure enough they were filled with carbon remains... After all of that my question is that do u think that the only reason my mileage droped was the plugs and what else can i do to increase gas mileage...