Review on Mopar 5210 0552AG Fuel Tank by Jason Bell

After a few years of "Check Engine Light" on and off, I'm glad this solved the problem, as were a few others. Our 2003 4 cylinder Jeep Wrangler had issues with check engine light on, rough running and poor fuel economy (17-18 mpg). We took it to the dealer where we bought it a few years after buying it new and they told us to use a gas additive that would solve our problems. It was about 15,000 miles. Now, after 56,000 miles and after all these years of using gas additives in ethanol-free gasoline, we find that a $20 gas cap solves the problem. The last tank of fuel averaged 25.4 mpg.