Archoil AR9100 Oil Treatment

Yes · AR9100 uses a boron-compound friction modifier with no phosphorus content, which means it does not contribute to catalytic converter poisoning. The brand's TDS explicitly notes the formula benefits modern engine oils where zinc levels have been reduced to prevent catalyst issues. Unlike ZDDP-based additives, AR9100 does not raise oil phosphorus levels and is compatible with API SP specification oils.

Engine oil, limited-slip differentials, and motorcycles: 1.2 oz per quart of oil. For a standard 5-quart engine fill, that is approximately 6 oz per oil change, or roughly 2·3 maintenance doses per 16-oz bottle. Gear oil, hydraulic oil, and power steering fluid: 3.2 oz per quart. For the Ford 6.0L or 7.3L Powerstroke HEUI stiction treatment, use the full 16-oz bottle as the initial dose (these engines hold 13·16 quarts of oil).

The 6.0L and 7.3L Powerstroke use hydraulically-actuated electronically-controlled injectors (HEUI) that depend on engine oil pressure for activation. Over time, varnish and deposit buildup ('stiction') causes injectors to stick, leading to cold-start misfires, rough idle, and sluggish response. AR9100's boron-compound active is intended to reduce friction and clean internal injector surfaces. Community evidence across powerstroke.org and Bob Is The Oil Guy shows multiple documented cases of stiction resolution with the full-bottle initial treatment.

Yes · oil analysis from Blackstone Laboratories and similar services shows elevated boron and potassium levels in oil that contains AR9100. This is expected and normal; the boron and potassium signatures are markers of the nanoborate chemistry being present and active in the oil. These elevated readings should not be flagged as engine wear concerns when AR9100 is in use.

Yes. The product is marketed for all diesel and gasoline engines. The best-documented use case is the Ford 6.0L/7.3L Powerstroke diesel for HEUI stiction, but community evidence from BITOG also covers positive results in gasoline engines, reporting quieter operation and favorable oil-analysis results. There are no documented contraindications for gasoline engines.

Yes · the product listing carries a California Proposition 65 warning. The SDS discloses paraffin oil (CAS 8012-95-1) as a component at less than 15%; certain mineral oil fractions carry Prop 65 listings for polycyclic aromatic hydrocarbons (PAHs) in non-severely-hydrotreated grades. The warning reflects California's disclosure requirement and does not alter the SDS §2 hazard classification, which lists only H319 (eye irritation) at the mixture level.