oilcheckup 

OilCheckUp test kits with specialized test media for any fluid providing visual and comparative results of amount of contaminants, wear metals, soot, sludge, change in viscosity, depletion of oil additives, and indication of water, fuel, or glycol dilutions

OilCheckUp for engine oil, transmission, brake, steering, differential, hydraulic, gear fluids

oilcheckup by oilcheckup June 28, 2011

oilchecker 

A euphemism for a guy who likes anal sex

He was known by all his close buddies to be an avid oilchecker.

oilchecker by Dr Bunnygirl January 30, 2019