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How many MPG does an old school bus get?

Type 'A' buses on the Ford chassis with the 460 gas V-8 got 5-9 MPG with the honest average closer to 5 MPG than to 9 MPG. The Type 'A' buses on the Chevy/GMC chassis with the 6.2L diesel V-8 were underpowered, slow, noisy, and not very fuel efficient. 10-14 MPG. The engines were pretty stout but underpowered in a bus.



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  • Diesel is the most fuel-efficient engine type on the market.
  • Diesel offers up to 50% better fuel economy compared to other similar-size gasoline, propane or compressed natural gas engines.**
  • Diesel outperforms other fuels in operating range.
  • Diesel buses have better resale value.
  • Diesel buses are less expensive to buy.


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Executive buses average 6 miles per gallon, especially when it comes to larger models that carry 45 to 51 passengers. Newer, high-tech models may get up to 10 to 12 miles per gallon. The larger the bus, the lower the average mileage.

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My rule of thumb when I was shopping for a bus was a well maintained gas bus with under 100,000 miles or a well maintained diesel bus with under 200,000. In theory, a well maintained diesel engine can practically run forever. I drive city buses. They often have multiple million miles before they retire them.

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This timeframe matches a diesel school bus, which has an average lifespan of 12 – 15 years as well.

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The tanks on gas buses are usually either 30 or 60 gallons.

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Which mode of transportation is best for the earth? Actually, the bus -- specifically, city-to-city buses like the Greyhound. The bus itself gets a paltry 6 miles per gallon. The reason buses are environmentally sound is that they are usually full of people, giving it the highest miles per gallon per passenger, at 208.

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The two technologies are similar, but differences in design mean that diesel engines are built tougher and last longer. This is true for all types of passenger cars, trucks, commercial vehicles and other diesel-powered equipment. Like all engines, diesels only last a long time if they're looked after properly.

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With the Cummins B6. 7, L9, or Cummins Westport B6. 7N and L9N, you can't go wrong with your first pick when it comes to providing a highly reliable, clean emissions power source.

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There are different factors to consider about the lifespan of a school bus – whether it's fueled by diesel or propane autogas. The average lifespan of a school bus is 12 to 15 years.

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A full size bus holds about 250 gallons of fuel. This make the range about 625 to 750mpg depending on the style of bus. The longest range electric bus made by Proterra was driven 1,101 miles on one charge. Most electric buses on the road today get 100- 250 miles to a charge.

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According to the Alternative Fuels Data Center, school buses get an average fuel economy of just 6.02 miles per gallon (MPG).

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