See also:

Detachable trailer hitch (accessory)
Detachable trailer hitch (accessory) a Ball holder b Locking bolt c Cotter pin d Hitch assembly e Safety wire attachment ...

Gasoline containing alcohol and ethers, "Oxygenated fuels"
Some fuel suppliers sell gasoline containing "oxygenates" which are usually alcohols or ethers. In some areas, state or local laws require that the service pump be marked indicating use ...

Deposit control gasoline (detergent additives)
Volvo recommends the use of detergent gasoline to control engine deposits. Detergent gasoline is effective in keeping injectors and intake valves clean. Consistent use of deposit control gasolines ...