Designed by the industry's leader in braking technology for vehicles using DOT 3, DOT 4, and DOT 5. brake fluids. Compatible with DOT 3 / DOT 4 / DOT 5.1. High compatibility. Extended Service Interval (ESI): Lasts 100% longer than DOT 3, 50% longer than DOT 4, and 10% longer than DOT 5.1.