This just came on the CZ list

------ Forwarded Message
From: al p wick <alwick@juno.com>
Date: Sat, 4 Dec 2004 13:45:55 -0800
To: Cozy_Builders@mailman.qth.net
Subject: Re: COZY: Fuel efficiency?

That reminds me, the other viable option is to alter the coolant temp
info going to the ECM. The engine makes substantial mixture decisions
based on coolant temp. So making engine look a little warmer will cause
it to lean mix. I've never bothered to look into it myself, but I got
info from good source.

-al