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MetroMPG · 09-01-2010, 05:06 PM

theycallmeebryan is right on the money: for highway driving, you need to focus on aero mods.

VW's are also popular for top gear swaps to reduce engine RPM at cruise.

I'm not sure of any studies/valid tests of exhaust mods that have been shown to improve economy. Lots of testimonials, but they don't count.

09-01-2010, 05:06 PM	#4 (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	theycallmeebryan is right on the money: for highway driving, you need to focus on aero mods. VW's are also popular for top gear swaps to reduce engine RPM at cruise. I'm not sure of any studies/valid tests of exhaust mods that have been shown to improve economy. Lots of testimonials, but they don't count. __________________ 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