Схожесть и отличия присадок CUPPER и VALENА -SV.

It's no secret that various additives and performance enhancers are added to motor oils, lubricants, and fuel. But often, to improve a car's performance, we add additional additives ourselves. I work with VALENA-SV, a copper-tin-based metal-plating additive, but I recently heard about Cupper additives, also copper-based...