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 — 1998 Audi A6 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 Drain and Refill 2.75 QTS. 2.6 L VOLKSWAGEN Automatic Transmission Fluid G052162 A2 S Automatic Transmission Fluid Total Capacity 9.50 QTS. 8.99 L VOLKSWAGEN Automatic Transmission Fluid G052162 A2 S Brake Fluid N/A N/A DOT 4 Brake Fluid Fill between "max" and "min" lines on reservoir. S Engine Coolant 9.00 QTS. 8.51 L The cooling system has been filled at the factory with permanent coolant which DOES NOT need to be changed.
The coolant consists of a mixture of water and the manufacturer's coolant additive G 12 A8DTL 774 D - antifreeze on glycol basis with 50% anti-corrosive additives. S Engine Oil 6.30 QTS. 5.96 L SAE 5W-40. Petroleum or synthetic based oils. Engine oil must conform to the exact specification in VW publication VW 502 00. See TSB No. 17 09-07 (2012855). Use only a high-quality engine oil that expressly complies with the AUDI oil quality standard specified for your vehicle's engine. Using any other oil can cause serious engine damage that will not be covered by any AUDI Limited Warranty.
DO NOT mix lubricants or other additives into the engine oil. Doing so can cause engine damage. Damaged caused by these kinds of additives are not covered by any AUDI Limited Warranty.
To prevent overfilling add approximately 0.5 less oil than specification listed. Start engine and let it run until engine operating temperature is approx. 140Deg.F (60Deg.C), turn off ignition, wait aproximately 3 minutes and recheck fluid level, then fill to mark (may be more/less than 0.5 QT. depending on model) TURBO ENGINES ONLY: After changing engine oil and filter, start and run engine at idle until oil pressure light goes out. DO NOT rev engine this could cause damage/failure of turbocharger.
Quantities are approximate.
DO NOT overfill. S Fuel Tank 18.50 GALS. 70.03 L S Power Steering Fluid N/A N/A Audi Hydraulic Oil Part No. G 002 000 or equivalent. S Transfer Case Fluid 0.85 QTS. 0.8 L API - GL-4, SAE 75W-90 Synthetic S Windshield Washer Fluid 5.00 QTS. 4.73 L Mixture of water and a Glass Cleaning Solution Follow the Manufacturer's Instructions for the mixture ratio. 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.
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