L31MaxExpress
I'm Awesome
Don't forget less air for a box on wheels to cut through too. I25 from Colorado Springs to Denver and back is also a magical stretch of road. I averaged 31mpg there and back once in the Z06. Everything I drive there and back gets weirdly good mpgs.
I was definitely surprised. I went 285 and 160 across the mountains from Denver to Pagosa springs. It felt like the engine was really working hard, but evidently it was just from the torque loss of being in the thinner air. I filled up right as I was leaving Denver and did not have to get fuel again until I was in New Mexico on my way home. I managanged an almost freakishly good 25 mpg that tank. I thought the dash MPG display was lying its butt off, but hand calculating it, was nearly spot on. I filled up in northern New Mexico and made it almost to Lubock on that tank and even running 75-80 mph at times still managed 22.2 mpg.
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