These new LP buses are liquid injected instead of the old "gas engine converted to run on propane vapor". The old engines were junk from the get go, these new ones are much much much better. Around here the cost difference of propane would make it worthwile, but I'm going to guess your cost difference in NY isn't anywhere close to ours in Ill. I work for a LP distributer as a driver/salesman. I drive a 2008 IH Durastar 4900. It uses the clean diesel technology. I love the truck, but hate the engine. I'd take my old trucks engine over this one, or even a LP engine. My personal opinion is that these "clean diesels" are extremely dangerous. The "afterburner" on mine will get to 1200 degrees F to burn off the soot. It is mounted about 1 1/2 ft above the ground. What happens is it starts its procedure and I am parked along a road with grass or in a field of wheat stubble/corn stalks (we have a lot of oil wells around this area and I have to drive the truck through those fields to get to them). I'm not saying that the LP buses are the way to go, that should come down to numbers crunching by the school (and yes, oil changes should be figured into it, refilling (*), engine life, parts availability, etc). Sometimes changes are the way to go sometimes its best to stick with what you have, only the "true costs" will tell you what is best. As for being scared of LP, I wouldn't worry about that. Remember that any fuel will/can start a fire. We had an accident in Illinois probably 15-17 yrs ago where a truck T-boned a school bus and ruptured the fuel tank causing a fire. A lot of lives were lost in that accident and it was not a propane bus. Good chance that if it is a LP bus and the LP tank is hit in an accident it will not rupture. The valves are designed to break off in a certain place and then stop the flow of fuel. Adam
* - As far as refueling the busses it is no harder than gasoline or diesel, but it just takes a little training. These new DOT tanks can't be overfilled as they have a special valve in them. And pumping the fuel isn't much different than gasoline of diesel.
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Today's Featured Article - Earthmaster Project Progress Just a little update on my Earthmaster......it's back from the dead! I pulled the head, and soaked the stuck valves with mystery oil overnight, re-installed the head, and bingo, the compression returned. But alas, my carb foiled me again, it would fire a second then flood out. After numerous dead ends for a replacement carb, I went to work fixing mine.I soldered new floats on the float arm, they came from an old motorcycle carb, replaced the packing on the throttle shaft with o-rings, cut new ga
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