1989 Porsche 928 Oil Type & Capacity: 5W-20 (8.0 quarts)
The 1989 Porsche 928 takes 5W-20 motor oil — 8.0 quarts with a filter change, per the factory service manual.
Oil capacity by engine
| Engine | Oil Type (viscosity) | Capacity w/ Filter | Capacity w/o Filter | Notes |
|---|---|---|---|---|
| Automatic — 5.0L Eng | SAE 5W-20 (Below -20Deg.F to 15Deg.F), 5W-30 (-20Deg.F to 30Deg.F),10W-30 (-10Deg.F to 70Deg.F), 10W-40 (-5Deg.F to 95Deg.F), 15W-40 (5Deg.F to Above 100Deg.F), 20W-40/50 (15Deg.F to Above 100Deg.F) | 2.00 GALS. | — | — |
| Standard — 5.0L Eng | SAE 5W-20 (Below -20Deg.F to 15Deg.F), 5W-30 (-20Deg.F to 30Deg.F),10W-30 (-10Deg.F to 70Deg.F), 10W-40 (-5Deg.F to 95Deg.F), 15W-40 (5Deg.F to Above 100Deg.F), 20W-40/50 (15Deg.F to Above 100Deg.F) | 2.00 GALS. | — | — |
More factory specs & repair guides for your 928
🛞 1989 Porsche 928 Tire Size & Pressure →🌧️ 1989 Porsche 928 Wiper Blade Sizes →💡 1989 Porsche 928 Light Bulb Sizes →📖 1989 Porsche 928 Factory Service Manual →All fluid capacities (transmission, coolant, brakes)Powered by factory manual data from our partner network AllOEMManuals.com.
Coolant capacity
16.92 quarts (16.01 L) — Phosphate-free antifreeze containing Ethylene Glycol Antifreeze recommended for aluminum engines and radiators
Frequently asked questions
What type of oil does a 1989 Porsche 928 take?
The 1989 Porsche 928 takes 5W-20 motor oil (SAE 5W-20 (Below -20Deg.F to 15Deg.F), 5W-30 (-20Deg.F to 30Deg.F),10W-30 (-10Deg.F to 70Deg.F), 10W-40 (-5Deg.F to 95Deg.F), 15W-40 (5Deg.F to Above 100Deg.F), 20W-40/50 (15Deg.F to Above 100Deg.F)), per the factory service manual.
What is the oil capacity of a 1989 Porsche 928?
The 1989 Porsche 928 oil capacity is 8.0 quarts with a filter change.
How often should I change the oil in my 1989 Porsche 928?
Most 1989 Porsche 928 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 1989 Porsche 928?
Yes. 5W-20 is widely available as a full synthetic, and synthetic is safe (often recommended) for the 1989 Porsche 928. What matters most is matching the factory viscosity and specification, then changing the oil and filter on schedule.