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.
1991 Audi 100Oil Type & Capacity
OEM spec from the factory service manual for the Base variant.
Quick Answer
Oil Type
$API - SAE 5W-20/30 (Below -15Deg.F to 20Deg.F), 10W-30/40 (-5Deg.F to 65Deg.F), 15W-40/50 (10Deg.F to Above 85Deg.F), 20W-40/50 (15Deg.F to Above 85Deg.F)
Capacity (w/ Filter)
5.00 QTS.
4.73 L
Variant
Base
This vehicle's factory manual
1991 Audi 100: confirm the engine, trim, or drivetrain to open the available repair and diagnosis sections.
Sister site: See this spec on WhatTypeOfOil.com — our quick oil type & capacity lookup for every vehicle.
Other specs:All specs
What You'll Need
Engine Oil
$API - SAE 5W-20/30 (Below -15Deg.F to 20Deg.F), 10W-30/40 (-5Deg.F to 65Deg.F), 15W-40/50 (10Deg.F to Above 85Deg.F), 20W-40/50 (15Deg.F to Above 85Deg.F) for Audi 100
Search Amazon →
Oil Filter
Audi 100 Oil Filter
Search Amazon →
Tool
Oil Filter Wrench
Search Amazon →
Kit
Funnel + Drain Pan Kit
Search Amazon →
Related for Your 1991 Audi 100
Quick Actions
Frequently Asked Questions
- What type of oil does a 1991 Audi 100 take?
- The 1991 Audi 100 requires API - SAE 5W-20/30 (Below -15Deg.F to 20Deg.F), 10W-30/40 (-5Deg.F to 65Deg.F), 15W-40/50 (10Deg.F to Above 85Deg.F), 20W-40/50 (15Deg.F to Above 85Deg.F). The exact spec may vary slightly by engine variant — this page shows the OEM recommendation for the Base configuration.
- How much oil does a 1991 Audi 100 need?
- The 1991 Audi 100 takes 5.00 QTS. (4.73 L) of engine oil with the filter replaced.
- Can I use synthetic oil in my 1991 Audi 100?
- Yes — synthetic oil that meets the API - SAE 5W-20/30 (Below -15Deg.F to 20Deg.F), 10W-30/40 (-5Deg.F to 65Deg.F), 15W-40/50 (10Deg.F to Above 85Deg.F), 20W-40/50 (15Deg.F to Above 85Deg.F) specification is acceptable and often preferred for better protection and longer change intervals.
- What happens if I use the wrong oil in my 1991 Audi 100?
- Using oil that does not meet the API - SAE 5W-20/30 (Below -15Deg.F to 20Deg.F), 10W-30/40 (-5Deg.F to 65Deg.F), 15W-40/50 (10Deg.F to Above 85Deg.F), 20W-40/50 (15Deg.F to Above 85Deg.F) specification can reduce engine protection, increase wear, and potentially void warranty coverage. Always use oil that meets the OEM spec.