gas mileage getting worse?
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gas mileage getting worse?
Hey guys, I'm noticing recently that my gas mileage is slowly going down the drain w/ my vortech 3.12 pulley setup. Before I would average 270 miles per gallon. Yesterday I filled up at 211 miles when the light came on (about 13.5 mpg). I'm fairly certain I haven't changed my driving habits. AFR's look relatively normal compared to before. I cleaned the air filter my last oil change around 1k miles ago. What are some possible reasons why my mileage could be like this? I know I recently retightened my belt..... could overtightening it have caused this? What else could cause a drop in mileage?
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