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MetroMPG · 04-11-2008, 12:01 PM

With your 4-cylinder engine, I'm betting the most economical cruising speed is just after your highest gear engages / torque converter locks up. Just guessing, but it's probably fairly close to 75-80 km/h or 50 mph. So if 55 is the minimum you feel you can safely cruise, it's probably not too bad. Your ScanGauge should help you answer that question pretty quickly.

04-11-2008, 12:01 PM	#10 (permalink)
MetroMPG Batman Junior Join Date: Nov 2007 Location: 1000 Islands, Ontario, Canada Posts: 22,457 Blackfly - '98 Geo Metro Team Metro Last 3: 70.09 mpg (US) MPGiata - '90 Mazda Miata 90 day: 55.97 mpg (US) Even Fancier Metro - '14 Mitsubishi Mirage top spec 90 day: 70.75 mpg (US) Appliance car - '14 Mitsubishi Mirage ES (base) 90 day: 67.41 mpg (US) Thanks: 3,992 Thanked 6,886 Times in 3,572 Posts	With your 4-cylinder engine, I'm betting the most economical cruising speed is just after your highest gear engages / torque converter locks up. Just guessing, but it's probably fairly close to 75-80 km/h or 50 mph. So if 55 is the minimum you feel you can safely cruise, it's probably not too bad. Your ScanGauge should help you answer that question pretty quickly. __________________ 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