1990 Porsche 911 Oil Type & Capacity: 15W-40 (9.5 quarts)
The 1990 Porsche 911 takes 15W-40 motor oil — 9.5 quarts with a filter change, per the factory service manual.
Factory-spec answer
15W-40 — 9.5 quarts with filter
Oil capacity by engine
| Engine | Oil Type (viscosity) | Capacity w/ Filter | Capacity w/o Filter | Notes |
|---|---|---|---|---|
| Carrera 2, 2D Convertible, Automatic — 3.6L Eng | API - SF/CC, SF/CD, SG/CC or SG/CD, SAE 15W-40, 20W-50/40 (Above 50Deg.F), SAE 15W-40, 10W-40/30 (Below 50Deg.F), SAE 10W-30 and 5W-30 (Below 14Deg.F) | 9.50 QTS. | — | Manufacturer's approved fluid only. |
| Carrera 2, 2D Convertible, Standard — 3.6L Eng | API - SF/CC, SF/CD, SG/CC or SG/CD, SAE 15W-40, 20W-50/40 (Above 50Deg.F), SAE 15W-40, 10W-40/30 (Below 50Deg.F), SAE 10W-30 and 5W-30 (Below 14Deg.F) | 9.50 QTS. | — | Manufacturer's approved fluid only. |
| Carrera 2, 2D Coupe, Automatic — 3.6L Eng | API - SF/CC, SF/CD, SG/CC or SG/CD, SAE 15W-40, 20W-50/40 (Above 50Deg.F), SAE 15W-40, 10W-40/30 (Below 50Deg.F), SAE 10W-30 and 5W-30 (Below 14Deg.F) | 9.50 QTS. | — | Manufacturer's approved fluid only. |
| Carrera 2, 2D Coupe, Standard — 3.6L Eng | API - SF/CC, SF/CD, SG/CC or SG/CD, SAE 15W-40, 20W-50/40 (Above 50Deg.F), SAE 15W-40, 10W-40/30 (Below 50Deg.F), SAE 10W-30 and 5W-30 (Below 14Deg.F) | 9.50 QTS. | — | Manufacturer's approved fluid only. |
| Carrera 4, 2D Convertible — 3.6L Eng | API - SF/CC, SF/CD, SG/CC or SG/CD, SAE 15W-40, 20W-50/40 (Above 50Deg.F), SAE 15W-40, 10W-40/30 (Below 50Deg.F), SAE 10W-30 and 5W-30 (Below 14Deg.F) | 9.50 QTS. | — | Manufacturer's approved fluid only. |
| Carrera 4, 2D Coupe — 3.6L Eng | API - SF/CC, SF/CD, SG/CC or SG/CD, SAE 15W-40, 20W-50/40 (Above 50Deg.F), SAE 15W-40, 10W-40/30 (Below 50Deg.F), SAE 10W-30 and 5W-30 (Below 14Deg.F) | 9.50 QTS. | — | Manufacturer's approved fluid only. |
More factory specs & repair guides for your 911
🛞 1990 Porsche 911 Tire Size & Pressure →🌧️ 1990 Porsche 911 Wiper Blade Sizes →💡 1990 Porsche 911 Light Bulb Sizes →📖 1990 Porsche 911 Factory Service Manual →All fluid capacities (transmission, coolant, brakes)Powered by factory manual data from our partner network AllOEMManuals.com.
Frequently asked questions
What type of oil does a 1990 Porsche 911 take?
The 1990 Porsche 911 takes 15W-40 motor oil (API - SF/CC, SF/CD, SG/CC or SG/CD, SAE 15W-40, 20W-50/40 (Above 50Deg.F), SAE 15W-40, 10W-40/30 (Below 50Deg.F), SAE 10W-30 and 5W-30 (Below 14Deg.F)), per the factory service manual.
What is the oil capacity of a 1990 Porsche 911?
The 1990 Porsche 911 oil capacity is 9.5 quarts with a filter change.
How often should I change the oil in my 1990 Porsche 911?
Most 1990 Porsche 911 owners follow a 5,000–7,500 mile interval with conventional oil, or up to 10,000 miles with full synthetic. Always check the oil life monitor if equipped, and consult your owner's manual — Porsche recommends intervals based on driving conditions, not just mileage.
Can I use synthetic oil in my 1990 Porsche 911?
Yes. 15W-40 is widely available as a full synthetic, and synthetic is safe (often recommended) for the 1990 Porsche 911. What matters most is matching the factory viscosity and specification, then changing the oil and filter on schedule.