How can I restore fuel efficiency to my 2002 Honda Accord?

I have a 2002 Honda Accord, 2.3 litre. As per specification, it should run about 100 km/10 litres in city and 100 km/7.2 litres on highway. But it's giving me an average mileage of 100km/10 litres where I drive most on highways. What are the ways to restore efficiency to my 2002 Accord?How can I restore fuel efficiency to my 2002 Honda Accord?Your car does not need premium gas so do not run it. It is a waste of your money and of oil refineries limited abilities. If you have not in the past you can change the air filter, spark plugs, fuel filter, and clean the fuel and intake systems. Also make sure that you change your oil regularly and make sure that your tires are inflated to the correct pressure listed on teh sticker on the drivers door well. Also, cars do not live up to the specified fuel standards that car companies claim. Up until model year 2007 the fuel economy was derived using out of date techniques. In 2008 the way they calculate this was completely changed. Go to this website for the old and new numbers http://www.fueleconomy.gov/feg/ratings20鈥?/a>

according to it the ratings dropped about 5%.How can I restore fuel efficiency to my 2002 Honda Accord?Have you tried a good tune-up on your car??? That would be the first thing that I would do and then also check your tire pressure. These are just some of the things that you can do and also try replacing the fuel filter and air filter (all part of a good tune-up. Also make sure that you have the proper gap in your spark plugs and that they are not closed up.How can I restore fuel efficiency to my 2002 Honda Accord?The best thing I can recommend to you is to try running it on 98 RON high density high octane PULP, either of four brands: Caltex/Texaco Vortex, Mobil Synergy 8000, BP Ultimate and Shell V-Power (Caltex is the Australian equal of Texaco). We have a 1993 Ford Fairmont sedan and we run Shell V-Power in the fuel tank and we get between 8.5 and 9.9L/100km on the highway and 9 to 10.9L/100km in town (according to the trip computer in the car).How can I restore fuel efficiency to my 2002 Honda Accord?
have the valves adjusted "cold".