i recently used 10 gallons of gas for a roundtrip 380 mile trip in my 2008 Dodge Caliber, 2.0L 4 cyl. the car was great, the gas mileage wonderful i must say!! i hadnt run my car at any long distance trip since i bought it in 2009, has only 22k miles on it. car had been using alot of fuel for city driving lately. I added 6 oz Lucas before my fuel up and can report that the car enjoyed the ride.....I wonder if the Lucas did indeed help? most Caliber owners report 30mpg or less on highway......