2010-03-29 398 7.447 $2.59 53.44 "90% highway between 65 and 70 mph. Had my voltmeter hooked up to monitor lean burn. No ecomods, no coasting, no drafting, no P&G, just drove on the highway like normal (and tried to never let it out of lean burn mode). First tank recorded after new o2 sensor. 53.44 mpg... WOW!"