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MetroMPG · 07-15-2008, 10:17 PM

You're taking a significant hit from leaving it up there when it's not in use.

Mini-experiment: the wrath of roof racks - MetroMPG.com

These roof racks:

... reduced my MPG by 12% at 55 mph - empty. With the bike in the rack, mpg dropped 27%.

Obviously not directly comparable to your vehicle, but as a rule you should avoid carrying things on top of a vehicle if at all possible.

07-15-2008, 10:17 PM	#6 (permalink)
MetroMPG Batman Junior Join Date: Nov 2007 Location: 1000 Islands, Ontario, Canada Posts: 22,534 Blackfly - '98 Geo Metro Team Metro Last 3: 70.09 mpg (US) MPGiata - '90 Mazda Miata 90 day: 54.46 mpg (US) Appliance car Mirage - '14 Mitsubishi Mirage ES (base) 90 day: 57.73 mpg (US) Thanks: 4,082 Thanked 6,979 Times in 3,614 Posts	You're taking a significant hit from leaving it up there when it's not in use. Mini-experiment: the wrath of roof racks - MetroMPG.com These roof racks: ... reduced my MPG by 12% at 55 mph - empty. With the bike in the rack, mpg dropped 27%. Obviously not directly comparable to your vehicle, but as a rule you should avoid carrying things on top of a vehicle if at all possible. __________________ Project MPGiata! Mods for getting 50+ MPG from a 1990 Miata Honda mods: Ecomodding my $800 Honda Fit 5-speed beater Mitsu mods: 70 MPG in my ecomodded, dirt cheap, 3-cylinder Mirage. Ecodriving test: Manual vs. automatic transmission MPG showdown EcoModder has launched a forum for the efficient new Mitsubishi Mirage www.MetroMPG.com - fuel efficiency info for Geo Metro owners www.ForkenSwift.com - electric car conversion on a beer budget