Fuel Economy, Hypermiling, EcoModding News and Forum - EcoModder.com - View Single Post - Effect of wet roads on efficiency: estimated 14.5% MPG drop

SentraSE-R · 10-15-2009, 02:56 AM

I took my SE-R out yesterday during the first rain of the season. I was only able to achieve 37 mpg, running windshield wipers, lights, and defroster fan on my 10 mile country road loop. Conditions were moderately steady (~.5"/hr) rain with 25 mph cross winds, 55 degree F temperature, and a few puddles with 1-2" deep water.

Last week, I drove the same road in the same car and got ~50 mpg on dry roads with 10-15 mph cross winds and temperatures about 10 degres F higher. So yes, the 23% drop in mileage sounds remarkably similar to the mileage drop I experienced.

10-15-2009, 02:56 AM	#23 (permalink)
SentraSE-R Pishtaco Join Date: Jun 2009 Location: Bay Area, California Posts: 1,278 Clean Green Toaster Machine - '06 xB 90 day: 45.81 mpg (US) Thanks: 39 Thanked 193 Times in 127 Posts	I took my SE-R out yesterday during the first rain of the season. I was only able to achieve 37 mpg, running windshield wipers, lights, and defroster fan on my 10 mile country road loop. Conditions were moderately steady (~.5"/hr) rain with 25 mph cross winds, 55 degree F temperature, and a few puddles with 1-2" deep water. Last week, I drove the same road in the same car and got ~50 mpg on dry roads with 10-15 mph cross winds and temperatures about 10 degres F higher. So yes, the 23% drop in mileage sounds remarkably similar to the mileage drop I experienced. __________________ Darrell Boycotting Exxon since 1989, BP since 2010 Have you ever noticed that anybody driving slower than you is an idiot, and anyone going faster than you is a maniac? George Carlin Mean Green Toaster Machine 49.4 mpg avg over 30,375 miles. 176% of '08 EPA Best flat drive 94.5 mpg for 10.1 mi Longest tank 1033 km (642 mi) on 10.56 gal = 60.8 mpg Clean Green Toaster Machine 45.8 mpg over 2235 miles, 164% of '08 EPA