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Message: <blockquote data-quote="Marc1" data-source="post: 21218" data-attributes="member: 1728"><p>Sorry about the above post. About 'efficiency'. I must disagree with the last post. Electric fans are inefficient in theory compared to mechanically driven yet they have a place in most modern cars. If CAT engeneers have built an all electric system, I am sure they are aware that a mechanical systemn would use a few grams of fuel less per week. They have probably written off a fraction of fuel in favour of a lighter systme easier to fit anywhere. Not everything comes down to fuel consumption and efficiency is a much broader concept that grams of fuel /HP/Hour. Just an example... what is more efficient, a Detroit Diesel 6 71 or a Cummis of comparable power? The Cummis will use less fuel yet brake down more frequently and end up needing a full rebuild by the time the DD needs a bit of a clean up. A $15,000 bill goes a long way to buy fuel!</p></blockquote><p></p>