Valvoline DOT 3 & 4 Synthetic Brake Fluid

Valvoline DOT 3 & 4 Synthetic Brake Fluid meets both DOT 3 and DOT 4 under FMVSS 116, the federal spec setting minimum boiling points for certified brake fluid. DOT 3 requires a dry point of at least 401°F and a wet point of 284°F; DOT 4 requires 446°F dry and 311°F wet. The front label claims 500°F dry, but that's label-only with no technical data sheet confirming it. The wet boiling point, 284°F confirmed on the back label, sits exactly at the DOT 3 wet minimum and 27°F below the DOT 4 wet minimum. Since brake fluid absorbs moisture over time, wet boiling point governs real-world heat resistance a year or two in, and the DOT 3 floor is a meaningful gap for a DOT 4-rated fluid.

For a daily driver where the manufacturer specifies DOT 3, this fluid covers the requirement, and the sales volume points to a broadly reliable product. Skip it if your vehicle requires DOT 4 performance: the wet boiling point doesn't meet the DOT 4 wet spec, and a dedicated DOT 4 fluid will give the actual margin your OEM specified. Skip for track or autocross use; those applications warrant DOT 5.1 with documented boiling points well above spec minimums.

The SDS carries a DANGER signal word from H318, serious eye damage; wear splash-proof safety goggles during caliper bleeding or any splash-risk operation, per SDS §8. Gloves suit extended bleeding sessions. A California Prop 65 warning appears on the back label for Diethanolamine. No respiratory protection is normally required; room ventilation is adequate. The sweet taste of this brake fluid is a documented attractant for pets and children; store sealed and out of reach. Used fluid is drain-destined, collect it for disposal, never pour it down a drain; H412 (chronic aquatic toxicity) means it must never reach a storm drain.