I've been toying with a simple water injection (a misnomer since it does not inject!) system that I found at:

http://journeytoforever.org/biofuel_library/ethanol_motherearth/me3.html

My 760 and 245 (both running 86 B230F engines) seem to have a bit more pick up with these bleeding into the intake manifold. The cost is about $5.00 and a quart of water per week. Fuel economy may be 1 mpg more than no water. If you are interested, use the largest fish tank rock that will fit in the jar (Rubber Maid from Walmart). The plans are at the tree hugger site that I posted.

I am working on the electronics for a fuel cell that we will test in a couple of months on the 760, in the meantime the simple approach seems to work a little bit.
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Will Dallas, www.willdallas.us, www.willdallas.org, www.willdallas.com, www.dallasprecision.com 86 245 DL 222K miles, 93 940 260K miles, 88 765 GLE 152K miles