Aside from taking samples from your fuel tank, how would they know?

-Jay

I always assumed they enforce by spot-checking fuel samples from your tank during routine traffic stops and at highway weigh stations.

so, if its in a passenger vehicle and not required to stop at weigh stations, you in theory, **should** be safe. I've never heard of the state police or any of the "County Mounties" ever checking the fuel in the tank of a passenger vehicle.

-Jay

I have heard that the dye can leave a residue elsewhere in vehicle, such that it might be noticed by an auto shop or an observant officer. I have no first-hand experience with this.

Incidentally, the company I am about to stop buying oil from has recently been charging MORE for home heating oil than diesel costs at the pump. I seriously considered finding a way to transport ~200 gallons of diesel fuel. Presumably, I could have gotten it even cheaper by buying "off-road" diesel, used in ATVs, construction equipment, etc (i.e. diesel vehicles that don't drive on the road), but we don't have an off-road pump near enough to us for me to know the current price of off-road diesel.

It's just the cost of the fuel without road tax.

This will help give you an idea on day to day diesel averages state to state, including off road.
https://www.etrucker.com/apps/promiles/fuelprices.asp

I would say, as far as the heating stuff, if you are gonna run WVO, you might as well start installing stuff. The question about temperatures is a good one. Are you gonna use your 2nd tank for WVO? IF so, you might as well pop in a heated pickup. it will make sure that the fuel is warm.

Home heating oil isn't Waste Vegetable Oil.

My comment about heating was in reply to this statement. I know that home heating oil isn't waste vegetable oil. Just saying that if the furnace oil may not be as fluid as the dino, and a WVO system is going in, might as well start installing the heating part.

What I find funny is that the home oil is higher in sulfur and polutes when burned in the home a heck of a lot more because you burn a heck of a lot more of it in a month than you would driving a typical truck - not a trailer truck. The polution still gets created . . . does no one see the bigger picture?

The bigger picture is that oil heat, despite all the new marketing campaigns, is nasty, stinky, and just generally sucks and I wish I could afford to switch to propane.