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Wow, that's not a lot to go on. My first thought is a fuel/air intake problem; clogged fuel injectors, dirty air filter. I check my fuel mileage at every refill. I also do regular maintenance. When my air filter needed replacement I got a Fram because it was cheapest. I lost power and mileage. I then bought a Percolatur with better airflow, big improvement. I also use fuel injector cleaner with every fill-up. It's only 96 cents at Wal-Mart. You may need a couple of bottles of the concentrated stuff for a few refills. Check your spark plugs and use stock champion, no cheepies, no dual-fire. Make sure they are gapped at .038 inches. (.04 was as close as I could get and it runs great) But, too little or too much and you lose power and fuel. Change your oil and filter every 3,000-4,000 miles with a synthetic blend. My manual recommends 10w-20, but I live in southern Texas where it's 90 degrees plus a lot of the time and 10w-30 gets me better mileage. These are inexpensive and easy fixes that worked for me, I wish you luck.

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15y ago
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Q: 2003 Dodge neon wasting fuel no power?
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