http://phmsa.dot.gov/pv_obj_cache/p...1158E8CCC9BAD7ECA407F1100/filename/mots05.pdf Should be here & here http://www.blm.gov/pgdata/etc/media...alreview/task1d.Par.9468.File.dat/sec2-10.pdf
But I should add only thing about Oil, is if you have a spill you do have to report it to EPA and have it cleaned up
" The USDOT listing of hazardous materials at 49 CFR 172.101. Certain types of materials (e.g., used oil) while they may contain potentially hazardous constituents, are specifically exempted from regulation as hazardous wastes. WDEQ also has regulations concerning management of certain types of hazardous materials. Other wastes that otherwise might be classified as hazardous are managed as universal wastes and are exempt from hazardous waste regulation as long as those materials are handled in ways specifically defined by regulation." Found this part also