Sites with price comparisons of airplane fuels should be sent to Recreation: Aviation: Resources.
Sites with price comparisons of automobiles should be sent to Purchasing or a related category.
Sites with advice on fuel economy should be sent to Advocacy and Protection.
Sites with advice on choose the correct type of fuel for your automobile should be sent to Fuels.

(If there''s any other related category we''ve forgotten, please note it in [brackets] with your submission, and we''ll consider noting it here.)