On Tue, 07 Feb 2006 17:51:45 GMT, Ignoramus11278
wrote:

the most efficient compressor setting would be pressure just above
that. Increasing pressure beyond that only wastes energy.

No, increasing tank pressure as much as possible (subject to the
compressor's capabilities and the tank rating) will increase efficiency.
This will be most noticeable if you use a "thirsty" tool in short
bursts.