Archoil

Archoil is a Connecticut-based specialty lubricant brand that developed the AR9100 friction modifier using nanoborate technology suspended in a fatty acid ester base — a chemistry approach distinct from the ZDDP and PTFE additive classes that dominate the oil additive market. The brand is particularly well-regarded among Ford Powerstroke diesel owners for its documented ability to resolve HEUI injector stiction issues in 6.0L and 7.3L engines.

Beyond diesel stiction remediation, Archoil positions AR9100 as a universal friction modifier for gasoline engines, transmissions, and axles. The brand maintains a small but loyal following across the truck and off-road enthusiast community, where long-term BITOG forum threads have tracked oil analysis data with AR9100.