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 90 CS Quattro 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 S Air Cond Refrigerant 1.38 LBS. 0.62 KG R-134a S Automatic Transmission Fluid 2.8L Eng 5.70 QTS. 5.39 L Automatic Transmission Fluid DEXRON or DEXRON II for torque converter. Synthetic Transmission Fluid G50, SAE 75W-90 for final drive S Brake Fluid N/A N/A DOT 4 Brake Fluid Fill between "max" and "min" lines on reservoir. S Engine Coolant 2.8L Eng 2.90 GALS. 10.97 L 50/50 mixture of Ethylene Glycol Antifreeze and water Use Phosphate-free Antifreeze. S Engine Oil 2.8L Eng 5.30 QTS. 5.01 L API - SAE 5W-30 (Below -0Deg.F to 80Deg.F), 10W-30/40 (5Deg.F to 80Deg.F), 15W-40/50 (5Deg.F to Above 100Deg.F), 20W-40/50 (15Deg.F to Above 120Deg.F) S Fuel Tank 2.8L Eng 16.00 GALS. 60.56 L Reserve tank capacity: 2.1 gals. S Manual Transmission Fluid AWD 2.50 QTS. 2.36 L Synthetic Transmission Fluid G 50, SAE 75W-90 (Mil-L-2105) or API - GL-4) S Power Steering Fluid N/A N/A Audi Hydraulic Oil Part No. G 002 000 or equivalent. S Transfer Case Fluid 1.10 QTS. 1.04 L API - GL-4, SAE 75W-90 Synthetic S Windshield Washer Fluid w/o Windshield & Headlight Container 4.60 QTS. 4.35 L S Windshield Washer Fluid w/Windshield & Headlight Container 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.