[SoothingDave]

Or if the government imposes a higher tax on diesel to make up the difference.

The diesel fuel is already more expensive than natural gas.

[Sherman Logan]

Yes. I meant an additional tax on diesel sufficient to make it cost-effective to buy a natural gas truck.

[woodbutcher1963]

The problem is the government hasn't figured out how to prevent people from filling up their natural gas vehicle at their house. If this started to happen in a big way it would effect the amount of tax revenue coming in to both the federal and state governments.

Maybe they will have to add some kind of colorant like they do with commercial diesel fuel versus what they put in fishing boats. That way they can tell by the color of the exhaust whether you have paid your highway tax.