What necessary component was refined in Amatuzio's 1970 formulation compared to early lab-synthesized oils?

A complete suite of additives (detergents, dispersants, anti-wear agents)

While the early German work successfully demonstrated the creation of superior synthetic base stocks, those initial laboratory products often functioned primarily as neat base stocks or required only simple additive packages. The critical refinement made by Al Amatuzio's team when creating the *fully formulated* consumer oil involved perfecting the integration of the synthetic base stock with a comprehensive system of additives. This suite—including detergents to manage soot, dispersants to prevent sludge, anti-wear agents, and corrosion inhibitors—was essential to ensure the oil could function reliably and protect an engine fully under the variable and often stressful conditions encountered in everyday passenger car driving, a level of sophistication absent in the earliest functional synthesis demonstrations.