[MetroMPG]

Looks nice, but I'll be surprised if the effect of the spoiler shows up definitively on the MPGuino in day to day use.

I think the best way to try testing this would be repeated sets of coastdown tests: more controlled, more sensitive to small changes.

I know a guy with a 2006 Civic who took his rear spoiler off (very similar to yours) for drag reduction. Who's right? Who knows!

I told him to get a 2006 Civic Hybrid style decklid lip spoiler.