I'm no chemist, so help me out here.
Where in the chemicals that make up gasoline is the "wax and varnish?"
Material Safety Data Sheet.
I did find this dealing with heavy lubricants used in oil production equipment:
"Guardex Stuffing Box Oil is a specially formulated lubricant, designed as
a rod and packing lubricant for both centrifugal and reciprocation action
pumps and equipment. The additives in Guardex Stuffing Box Oil breaks
down and controls wax and varnish build-up, while providing a superior
film of lubricant on the rod surface. Guardex Stuffing Box Oil lubricates and
prolongs the service period of packing and seals, while anti-corrosion
additives help combat environmental corrosion such as H2S or salt water.
"Recommended Uses
Guardex Stuffing Box Oil is recommended for use in all drip oilers or tank oil
systems, for lubrication of pump rods and packing.
"Advantages
*Superior lubrication
*Eliminates wax and varnish build-up on rods
*Extends packing life
*Equally effective on reciprocating and centrifugal rods
*Combats corrosion (eg. H2S, salt water, etc.)
*Extend life of equipment
Guardex
I'm not seeing a connection with gasoline.