Top Tier Detergent Gasoline is a designation given by a consortium of major automakers--BMW, General Motors, Honda, Toyota, and Volkswagen/Audi—to gasoline brands in the U.S. and Canada that meet their minimum standards for detergent content, and do not contain metallic additives. Top Tier gasoline contains higher levels of detergent additives in order to prevent the build-up of engine "gunk," known to reduce fuel economy and engine performance, and possibly lead to mechanical breakdown. The Top Tier designation is separate from the issue of octane levels—in order to get the designation, gasoline companies must prove a minimum level of engine-cleaning effectiveness in all grades of gasoline they sell, whether it is economy (low-octane) or premium (high-octane). However, premium gasolines may contain even higher levels of detergent additives. To date, more than 20 gasoline retailers in the US and 4 in Canada offer Top Tier gasoline.
Read more about Top Tier Detergent Gasoline: History, Availability, Purpose of Detergents in Gasoline, Characteristics of Top Tier Gasoline, Reception
Famous quotes containing the words top and/or gasoline:
“On the top of the Crumpetty Tree
The Quangle Wangle sat,
But his face you could not see,
On account of his Beaver Hat.”
—Edward Lear (1812–1888)
“I love the smell of napalm in the morning. You know, one time we had to hailbomb, for twelve hours, and when it was all over I walked up.... We didn’t find one of ‘em, not one stinking dink
body. That smell, you know, that gasoline smell. The whole hill. It smelled like ... victory.”
—John Milius, U.S. screenwriter, Francis Ford Coppola (b. 1939)