Most filling stations in Europe sell three types of fuel: unleaded, LRP, and diesel. Although these products lack any real brand differentiation, this has not always been the case. Until well into the 1970s, Gulf (in common with other oil companies) sold distinctive brands of petrol/gasoline including subregular Gulftane (briefly a midgrade low lead), Good Gulf regular, Gulf No-Nox premium, Gulf Super Unleaded, and Gulfcrest (Regular Unleaded). Gulfcrest was also a super premium grade in the 1950s and early 1960s. Gulf petrol was sold using the slogans ""Good Gulf Gasoline,"" and ""Gulf – the Gas with Guts."" Gulf service stations often supplied customers with pens and key rings bearing these slogans. For a few years, beginning in 1966, Gulf stations in the U.S. gave away orange plastic "Extra Kick Horseshoes" to customers who filled their tanks with Gulf's No-Nox premium gasoline (the novelty items were commonly mounted on bumpers).