I own 94 Honda Accord and I only get about 20mpg average. What could be the
 

cause and how can I help it? It has 187,000 miles on it ( the last 30,000 was mostly freeway, the previous owner told me). I have had it for 4 months now and its been OK since i bought it. the mileage just kills me. I need help asap















I had a tune up about 6 weeks ago but it did not help that much















The oil consumption is Ok, and the trunk empty. Tire pressure also fine.

Empty your trunk if there's anything in it, I've heard that can subtract up to 6 mpg