Green’s Dictionary of Slang

1. (US) alcohol.

1990

S. Morgan Homeboy 211: I need motion lotion myself to bribe a oneman cell.

2. (orig. US) gasoline, petrol.

1975		L. Dills CB Slanguage 70: Motion-Lotion: gas; fuel; e.g. ‘I’m peeling off for some of that motion-lotion’ [...] Motion Lotion with No Motion: bad fuel. Motion Potion: gasoline; fuel.
1988		Lewin & Lewin Thes. Sl. 165/2: Fuel [...] motion lotion.
2001		Guardian 9 Apr. 7: They fine you for landing and then you pay extra for the motion lotion.