Originally Posted By: DeafBrad
Originally Posted By: supton
Wife used to get 36 in her Camry, not sure what now, as I put on those RT43's and they are not LRR tires. I'd drive it and get 27-28. Hers is all rural, I'd be on the highway. Apparently drag increases the faster you go...
I've been getting 20 in my truck (EPA 19) last several tanks, and I haven't been trying either (60-70mph). Pure highway and just sane driving.
55 mph or 60 mph seems to be the magic number. Over that, the wind resistance really hurts gas mileage.
Ironically I think I get the best mpg in my Tundra in 5th gear, not 6th gear. 1,500rpm in 5th is about 48mph vs 60mph in 6th. The drop in mph and thus wind drag overcomes the engine making more revolutions per mile, it seems; and climbing hills in 5th at that speed is less drama than 6th (really have to feather the throttle in 6th to prevent unlock).
But yeah, that velocity squared really starts to pop up around 60 or so.