1998 Porsche Boxster Oil Type & Capacity
The 1998 Porsche Boxster takes 5W-30 motor oil — 8.7 quarts with a filter change, per the factory service manual.
Factory-spec answer
5W-30 — 8.7 quarts with filter
Oil capacity by engine
| Engine | Oil Type (viscosity) | Capacity w/ Filter | Capacity w/o Filter | Notes |
|---|---|---|---|---|
| Automatic | API - SAE 5W-30, 10W-30 (Below 14Deg.F), 10W-30/40, 15W-40 (Below 50Deg.F), 15W-40, 20W-40/50 (Above 50Deg.F) | 8.70 QTS. | 8.20 QTS. | Manufacturer's approved fluid only. |
| Standard | API - SAE 5W-30, 10W-30 (Below 14Deg.F), 10W-30/40, 15W-40 (Below 50Deg.F), 15W-40, 20W-40/50 (Above 50Deg.F) | 8.70 QTS. | 8.20 QTS. | Manufacturer's approved fluid only. |
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More specs & repair guides for your Boxster
1998 Porsche Boxster factory service manualAll fluid capacities (transmission, coolant, brakes)Powered by factory manual data from our partner site AllOEMManuals.com.
Coolant capacity
4.5 quarts (17.03 L). Manufacturer's approved fluid only.
Frequently asked questions
What type of oil does a 1998 Porsche Boxster take?
The 1998 Porsche Boxster takes 5W-30 motor oil (API - SAE 5W-30, 10W-30 (Below 14Deg.F), 10W-30/40, 15W-40 (Below 50Deg.F), 15W-40, 20W-40/50 (Above 50Deg.F)), per the factory service manual.
How much oil does a 1998 Porsche Boxster take?
The 1998 Porsche Boxster holds 8.7 quarts with a filter change, or 8.2 quarts without changing the filter.
Can I use synthetic oil in my 1998 Porsche Boxster?
Yes. 5W-30 is widely available as a full synthetic, and synthetic is safe (often recommended) for the 1998 Porsche Boxster. What matters most is matching the factory viscosity and specification, then changing the oil and filter on schedule.