What Six Fluids do I Need to Check in my Vehicle? These fluids are Engine oil, Coolant (Antifreeze), Power steering fluid, Brake fluid, Transmission fluid (in an automatic transmission vehicle, not a manual), and Windshield washer fluid. When do I check my fluid levels? It is advisable to check your fluids at the same time… Continue reading What Six Fluids do I Need to Check in my Vehicle?