Lets take it a step back. Where did the momentum come from?

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01 Ford Excursion Powerstroke
99 E300 Turbodiesel
91 Vette with 383 motor
05 Polaris Sportsman 800 EFI
06 Polaris Sportsman 500 EFI
03 SeaDoo GTX SC Red
03 SeaDoo GTX SC Yellow
04 Tailgator 21 ft Toy Hauler
11 Harley Davidson 883 SuperLow

For the sake of discussion, why not a hill with a tail wind?

Did the engine not pull the car up the hill? Doesn't every car benefit from tailwind?

But in order for that theory to be valid, every car would have to have the same mpg to get up the hill, which of course is incorrect. Otherwise people have paid different amounts of taxes to get up the hill!

They already do.

Vehicle A getting 15mpg pays more taxes to get up the hill than vehicle B goes getting 30mpg.

Lets assume the dealership is on the hill and your taking it home for the first time to your house in the valley.

Exactly my point. So then why should a vehicle that gets even better mileage (a veggie car) have to pay the same rate as a vehicle that gets worse mileage?

In forcedinductions post, they were comparing apples to apples. You have introduced an orange into the comparison.

__________________
01 Ford Excursion Powerstroke
99 E300 Turbodiesel
91 Vette with 383 motor
05 Polaris Sportsman 800 EFI
06 Polaris Sportsman 500 EFI
03 SeaDoo GTX SC Red
03 SeaDoo GTX SC Yellow
04 Tailgator 21 ft Toy Hauler
11 Harley Davidson 883 SuperLow

Please explain your reasoning.

In a higher MPG car, they are still paying road tax for the damage their cars do to the road. In your veggie car, it isn't getting better or worse mileage because you are using a totally different fuel. How do you compare apples to apples? Who pays for your road damage? The rest of the motorists?

__________________
01 Ford Excursion Powerstroke
99 E300 Turbodiesel
91 Vette with 383 motor
05 Polaris Sportsman 800 EFI
06 Polaris Sportsman 500 EFI
03 SeaDoo GTX SC Red
03 SeaDoo GTX SC Yellow
04 Tailgator 21 ft Toy Hauler
11 Harley Davidson 883 SuperLow

Again, then an electric hybrid which gets better mpg than a chevy caviler, pays less taxes than the chevy but both do damage to the road. A veggie car still pays taxes on diesel they put in the main tank. So they are still paying taxes, just like the hybrid.

I'm not seeing how these two are different in your argument.

Car A has better fuel economy than Car B. Therefore car A is assumed to have less weight and cause less damage to the road. A veggie car uses veggie as it's main fuel source as opposed to Car A and Car B. It's not like you are adding a few spoonfuls of octane booster. In your case, you are adding a few spoonfuls of diesel.

__________________
01 Ford Excursion Powerstroke
99 E300 Turbodiesel
91 Vette with 383 motor
05 Polaris Sportsman 800 EFI
06 Polaris Sportsman 500 EFI
03 SeaDoo GTX SC Red
03 SeaDoo GTX SC Yellow
04 Tailgator 21 ft Toy Hauler
11 Harley Davidson 883 SuperLow

If you frequent some of the WVO/SVO/Homebrew sites, you will find that in many states, there is no mechanism available for paying road tax on veggie oil fuels. Example - a guy calls/writes the DOR or appropriate state agency for the state he lives in. He tells them that he wants to pay road tax for the veggie oil that he is burning in his automobile. The state cannot figure out how to charge him for the road tax, and there is no system in place to allow him to pay the tax. By thinking outside the box and working outside the system, he has "blown the mind" of the state Dept of Revenue. They don't know how to allow him to pay the tax that he wants to voluntarily pay. End result - no road tax is paid on these alternative fuels.

SteveM.

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'93 190E/D 2.5 Turbodiesel 5-speed (daily driver)
'87 190D 2.5 Turbo rustbucket - parts car
'84 Dodge Rampage diesel - Land Speed Record Holder
'13 Ram 2500 Diesel
'05 Toyota 4Runner

That is a different kettle of fish. IMO, if you made a good faith effort and they exempted you or tell you there is no way to pay it, I'd say you were off the hook since you tried. Nobody can all you a crook since you can honestly say you tried to pay but there is currently no mechanism. OTOH, if you are quietly sliding by, that is another story.

__________________
01 Ford Excursion Powerstroke
99 E300 Turbodiesel
91 Vette with 383 motor
05 Polaris Sportsman 800 EFI
06 Polaris Sportsman 500 EFI
03 SeaDoo GTX SC Red
03 SeaDoo GTX SC Yellow
04 Tailgator 21 ft Toy Hauler
11 Harley Davidson 883 SuperLow

I believe what these folks are saying is:
1. There are two cars.
2. One that is a hybrid and gets 50 MPG.
3. One that is a diesel that gets 25 MPG.
4. The diesel owner then blends in 50% VO, bringing his effective MPG to 50 MPG in fuel-taxed fuel.
5. Why should he then pay EXTRA fuel taxes on top of what he is ALREADY paying when all he did was give himself the same $$$ of fuel tax per mile as the hybrid guy?

What people are saying is "The fuel tax system is NOT set up as a road-use type of system. It is set up as a fuel-use type of system. So if I am not using THEIR fuel, then I should logically pay no fuel tax for it. It would be like paying sales tax on vegetables that you grew in your own garden."

The fuel-tax is FAR from a "road-use" type of tax. If there were a road-use type of tax, the equation would be simple and fair:

miles driven * vehicle weight * tax factor

Naturally, however, an ACTUAL road-use tax would never be set up, because then trucking companies/truckers would actually have to pull their fair share of the taxes, and if that ever happened they'd just park their trucks in the middle of the road and cry about how unfair it is (like they did when supply and demand affected fuel prices, boo-hoo).

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'79 300SD
'82 Chevy Chevette diesel