Pentosin DOT 4 LV Low Viscosity Brake Fluid

No. The product is certified DOT 4 (specifically ISO 4925 Class 6 / Low Viscosity). Its TDS-documented dry boiling point of 509°F technically exceeds the DOT 5.1 dry minimum of 500°F, but the wet boiling point of 338°F is 18°F below the DOT 5.1 wet minimum of 356°F · the fluid does not clear both spec floors and therefore cannot carry a DOT 5.1 label. DOT 5.1 and DOT 4 LV are different specifications with different cold-viscosity and wet-BP requirements; do not substitute one for the other where the OEM is specific.

ISO 4925 Class 6 is the low-viscosity variant of DOT 4, with a maximum kinematic viscosity at −40°C of 700 mm²/s. It exists for vehicles with ABS, ESP, and other electronically controlled hydraulic modulators that depend on fast valve response at very cold temperatures · primarily BMW, Audi, Mercedes, and certain Ford applications. A standard DOT 4 fluid may be too viscous for those modulators in winter conditions. Pentosin DOT 4 LV is one of the OE-spec fluids called out for these systems.

Yes. The TDS and the product listing both explicitly state the fluid is engineered for vehicles with ESP and ABS. The boric-acid-triester / glycol-ether chemistry is the correct (non-silicone) base for all modern electronically modulated brake systems. DOT 5 silicone fluid is the type that is incompatible with these systems · never substitute DOT 5 for DOT 4 LV.

H361d is a GHS classification triggered by the boric-acid-triester base (CAS 302790-70-1) at 75·100% · boric acid is classified as Reprotoxic Category 2 in the EU. California's Prop 65 list, however, does not currently include CAS 302790-70-1, DIPA (CAS 110-97-4), or TEGBE (CAS 143-22-6) as developmental or reproductive toxins. The two systems use different evaluation criteria, so a product can carry a GHS reproductive-risk H-code without triggering a Prop 65 warning. SDS §15 documents this explicitly: 'no chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.'

Pentosin is the formulation behind multiple OE-spec part numbers on the bottle · Ford WSS-M6C65-A2 and Motorcraft PM-20 approvals are explicitly listed on the TDS, alongside the BMW, MINI, Audi/VW, GM, and Saab OEM reference numbers. Several owner forums note that Motorcraft-branded DOT 4 LV is the same Pentosin chemistry rebadged. For the listed European and Ford applications, this fluid is the OE-spec choice; for vehicles that simply call for generic DOT 4, a commodity DOT 4 fluid is also acceptable.