Thanks Everyone,
lean burn was on:
1992-1995 civic vx (eg hatchback)
1998-2005 civic hx (coupe)
2000-2006 insight (5spd only)
2002-2005 civic hybrid
the vx is a cheaper option, that can basically get a constant 70mpg+ on the highway, and without any hybrid related expenses.
...and it is easier than the insight to engage/sustain lean burn.
the hx will do maybe 50mpg from what I have heard.
lean burn is:
http://www.insightcentral.net/encyclopedia/enlaf.html
