1999 Porsche Boxster Oil Type & Capacity
The 1999 Porsche Boxster takes 10W-40 motor oil — 8.7 quarts with a filter change, per the factory service manual.
Factory-spec answer
10W-40 — 8.7 quarts with filter
Oil capacity by engine
| Engine | Oil Type (viscosity) | Capacity w/ Filter | Capacity w/o Filter | Notes |
|---|---|---|---|---|
| Automatic | API - SH, SAE 10W-40 | 8.70 QTS. | 8.20 QTS. | Manufacturer's approved fluid only. |
| Standard | API - SH, SAE 10W-40 | 8.70 QTS. | 8.20 QTS. | Manufacturer's approved fluid only. |
Buy the right oil
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More specs & repair guides for your Boxster
1999 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 1999 Porsche Boxster take?
The 1999 Porsche Boxster takes 10W-40 motor oil (API - SH, SAE 10W-40), per the factory service manual.
How much oil does a 1999 Porsche Boxster take?
The 1999 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 1999 Porsche Boxster?
Yes. 10W-40 is widely available as a full synthetic, and synthetic is safe (often recommended) for the 1999 Porsche Boxster. What matters most is matching the factory viscosity and specification, then changing the oil and filter on schedule.