[63corvette]

As I have posted earlier I know a good deal about EPA rules and regulations as I did deal with the agencies for a number of years before retirement. I can tell you as long as you are not an incorporated business you can transport Hazardous Materials without permits or placards up to a point if it is your personal waste. An example:
Racing Gasoline is considered a Hazardous Material however, unless you transport more than 110 gallons and it is not business related (for personal use) you are not breaking any laws. (The 110 gallons relates to a weight limit in pounds in the law which I can not recall without going and looking it up but anything over the 110 gallons is over limit which requires a permit or placards or both on the transporting vehicle depending on where you are state wise and road wise)

Used Oil is not considered a Hazardous Waste unless tested and determined to be Hazardous Materials with contaminates to a level which would make it Hazardous. (usually this is metals suspended in the oil)
One drop of the chlorinated brake cleaner can make hundreds of gallons of used oil test as Hazardous Materials which I am sure has happened at the race tracks in the past which may have caused some the additional rules also.

Used Oil filters are handled differently in every state.
Some states require all used oil filters to be squeezed and then disposed of.
Others require them to be shredded then incinerated in an approved manner.
Still other states will allow you to dispose of them in a landfill.
In the case of NHRA it is all about the money along with complying with the laws.
There is a buck to be made along the way and NHRA wants their cut. That is what this is all about.
Just My 2 Cents