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MetroMPG · 05-12-2008, 10:42 PM

I would not block the entire grille. While your max temp may have remained constant, the cooling fan may also be coming on more to keep the temp stable.

The fan is a relatively high amp accessory, and the added load could negate (possibly worsen) your fuel economy compared to the aero gains of the grille block.

That said, welcome to the site.

05-12-2008, 10:42 PM	#6 (permalink)
MetroMPG Batman Junior Join Date: Nov 2007 Location: 1000 Islands, Ontario, Canada Posts: 22,527 Blackfly - '98 Geo Metro Team Metro Last 3: 70.09 mpg (US) MPGiata - '90 Mazda Miata 90 day: 54.46 mpg (US) Even Fancier Metro - '14 Mitsubishi Mirage top spec 90 day: 70.75 mpg (US) Appliance car Mirage - '14 Mitsubishi Mirage ES (base) 90 day: 62.14 mpg (US) Thanks: 4,078 Thanked 6,976 Times in 3,612 Posts	I would not block the entire grille. While your max temp may have remained constant, the cooling fan may also be coming on more to keep the temp stable. The fan is a relatively high amp accessory, and the added load could negate (possibly worsen) your fuel economy compared to the aero gains of the grille block. That said, welcome to the site. __________________ 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