HVL High Viscosity Assembly and Break-in Lubricant - 8 oz bottle HVL is a Multi-Use Lubricant With Superior Film Thickness and Tack. Driven HVL is formulated with our GP-1 Pennsylvania Base Oil For Ultimate Cling & Tack. High viscosity assembly lubricant (HVL) provides a tenacious yet fluid film to protect reciprocating and rotating components during assembly and initial break-in. This non-foaming product mixes with the break-in oil and extends the oil film thickness during the critical break-in process. Fortified with ZDDP. Apply to engine bearings, piston skirts, bushings, timing chains and gears, as well as oil pump gears. HVL will not harden or cause parts to become "sticky." For SDS Tech Data Click Here