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.
1998 Porsche Boxster AutomaticFACTORY OEM SERVICE PROCEDURE
Quick Lookups: Fluids
| FLUID CAPACITIES | |||||||
|---|---|---|---|---|---|---|---|
| Fluid Type | Application | Standard | Metric | Fluid Spec | Note | S/H | |
| Air Cond Compressor Oil | 6.50 OZS. | 0.19 L | PAG 46 | S | |||
| Air Cond Refrigerant | 1.85 LBS. | 0.83 KG | R-134a | S | |||
| Automatic Transmission Fluid | 10.00 QTS. | 9.46 L | Automatic Transmission Fluid ESSO Type LT71141 Fluid | Manufacturer's approved fluid only. | S | ||
| Automatic Transmission Fluid | 2.5L Eng | 10.00 QTS. | 9.46 L | Automatic Transmission Fluid | Manufacturer's approved fluid only. | S | |
| Brake Fluid | 2.5L Eng | 0.40 QTS. | 0.37 L | Original PORSCHE Brake Fluid | Manufacturer's approved fluid only. | S | |
| Differential Gear Oil | 2.5L Eng | 2.40 QTS. | 2.27 L | SAE 75W-90 Transmission Oil | Manufacturer's approved fluid only. | S | |
| Engine Coolant | 2.5L Eng | 4.50 GALS. | 17.03 L | Manufacturer's approved fluid only. | S | ||
| Engine Oil | w/Filter | 8.70 QTS. | 8.23 L | 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) | Manufacturer's approved fluid only. | S | |
| Engine Oil | w/o Filter | 8.20 QTS. | 7.76 L | 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) | Manufacturer's approved fluid only. | S | |
| Fuel Tank | 15.00 GALS. | 56.78 L | S | ||||
| Manual Transmission Fluid | 2.5L Eng | 2.40 QTS. | 2.27 L | Transmission Fluid SAE 75W-90 | Manufacturer's approved fluid only. | S | |
| Power Steering Fluid | 2.5L Eng | 1.10 QTS. | 1.04 L | Hydraulic Fluid (Pentosin CHF 11 S) | Manufacturer's approved fluid only. | S | |
| Windshield Washer Fluid | w/Head Lamp Washers | 7.40 QTS. | 7 L | Use a winter cleaner or summer cleaner depending on the season | Follow the Manufacturer's Instructions for the mixture ratio. | S | |
| Windshield Washer Fluid | w/o Headlamp Washers | 2.60 QTS. | 2.46 L | Use a winter cleaner or summer cleaner depending on the season | Follow the Manufacturer's Instructions for the mixture ratio. | S | |
Factory Service Tools
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.