Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Fluids
Quick Lookups: Fluids — 1994 Audi S4 Service Manual : Fluids FLUID CAPACITIES Fluid Type Application Standard Metric Fluid Spec Note S/H Air Cond Compressor Oil 8.50 OZS. 0.25 L PAG 46 With R-134a System. S Air Cond Refrigerant 1.64 LBS. 0.74 KG R-134a S Engine Coolant 2.40 GALS. 9.08 L 50/50 mixture of Ethylene Glycol Antifreeze and water Use Phosphate-free Antifreeze. S Engine Oil 4.70 QTS. 4.44 L API - SAE 5W-50, 10W-50, 10W-60 (Below -20Deg.F to Above 95Deg.F), 5W-30, 10W-40 (Below -20Deg.F to 60Deg.F), 10W-30/40 (Below 5Deg.F to 60Deg.F), 15W-40/50, 20W-40/50 (5Deg.F to Above 100Deg.F) S Fuel Tank 21.10 GALS. 79.87 L Reserve tank capacity: 3.2 gals. S Windshield Washer Fluid 6.70 QTS. 6.34 L S
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.