1. All lift trucks manufactures have to comply to the same emissions standards as every one else - EPA Tier II standards and soon Tier III standards - so how clean is clean?

2. Fuel efficency is a matter of the operator,work cyscle, engine charactreistics, etc. (capacity per capacity most trucks have the same size engine). Engine performance today is controlled by computers, etc and your can't mess around with the settings - they tend to run leaner to meet emissions requirements. There are no standard means of measuring and comparing mpg of lift trucks brands.

3. If the major concern is fuel cost - look at electrics -to save energy cost. For example, it costs about $20.00 per refill on a 33# LPG tank and teh unit should run about 4.5 - 5 hours per tank full. To recharge the battery in an electric - the cost of electricilty is about $2.85 and the truck will run the same amount of time. The $$ saved pays back the initial higher cost. Plus electric run longer befor major repairs 12 - 14000 hours vs 8000 - 10000 on ICE trucks

4. Now electrics aren't for all applications - they don't like a lot of use on ramps, running in the rain ain't too good for them also, yep - some one needs to be responsible for battery maintenance - watering not over watering), equalize charing, etc. With 48 v batteries & charges the lifting and travel speeds are comparable to electrics. In multiple shift operations and battery charging and changin stations must be set up, etc.

This is just some infor to share with you.