Brake Fluid - McLaren P1 Owner's Handbook Manual

VEHICLE DATA AND GLOSSARY
SERVICE PRODUCTS, FLUIDS AND CAPACITIES

Brake Fluid

Only use Pentosin DoT 5.1 Brake fluid.
Over a period of time, the brake fluid absorbs
moisture from the air, this reduces its boiling
point.
WARNING: If the boiling point of the
brake fluid is reduced too much, vapour
pockets may form in the brake system
when the brakes are applied hard (e.g.
when driving downhill or track driving)
impairing the braking efficiency.
Therefore, have the brake fluid replaced
at the recommended service intervals.
7.11