This is a vintage mechanical point-of-sale demonstrator for Hi-Tach Oil Stabilizer, likely used in automotive service stations or repair shops. The unit consists of a clear rectangular plastic housing divided into two vertical chambers. Each chamber contains metal beaters connected to a central drive shaft, which is operated by an external chrome-finished hand crank with a light-colored composite grip. The base of the unit contains oil samples, with the left side labeled for 10W-40 oil and the right side for oil with Hi-Tach added. Several applied paper labels provide instructional and promotional text. The top label reads TURN FOR 40 SECOND TEST / BETTER LUBRICATED ENGINES / SAVE GAS, OIL AND REPAIRS. A circular logo features the numbers 1 through 7 and the text HI-TACH OIL STABILIZER THE PERFECTED LUBRICANT. A central red band states Prevents metal-to-metal contact. The bottom margin label describes the effects of dry starting and includes the original misspelling of the word recedes as RECEEDS.