Abstract: Improved gasoline compositions containing a minor amount of a polyalphaolefin having a viscosity at 100.degree. C. from 2 to 20 centistokes, and optionally also an aliphatic polyamine, an alkali or alkaline earth metal salt of a succinic acid derivative, and/or a polyolefin; together with a concentrate for the production of such gasoline composition and a method of operating a spark-ignition engine using such gasoline composition.

Abstract: A connection device for releasably interconnecting two members (16, 18) preferably a receptacle and its lid, comprising an upper component (1, 101) which is provided with a hook (21, 102) and a lower component (2, 103) and a one- or two-armed lever (3, 104) which is articulated on said lower component and which is provided with a counterhook (15, 105). In order to avoid that the connection device springs open or disengages unintentionally, a snapper (5, 109) is pivotably attached to the end of the lever (3, 104) facing away from the counterhook (15, 105), said snapper being provided with a locking projection (13, 113) which is associated with a complementary, projecting locking member (14, 114) of the lower component (2, 103) and which is equipped with a spring (12, 115) holding the snapper (5, 109) in its locking position.

Abstract: Gasoline composition comprising a major amount of a gasoline suitable for use in spark-ignition engines, and a minor amount of an alkali metal or alkaline earth metal salt of a succinic acid having as substituent on at least one of its .alpha.-carbon atoms an unsubstituted or substituted aliphatic hydrocarbon group having from 20 to 200 carbon atoms, or of a succinic acid derivative having as substitutent on one of its .alpha.-carbon atoms an unsubstituted or substituted aliphatic hydrocarbon group having from 20 to 200 carbon atoms which is connected to the other .alpha.-carbon atom by means of a hydrocarbon moiety having from 1 to 6 carbon atoms.