1988 Mazda RX-7 Oil Type & Capacity
The 1988 Mazda RX-7 takes 5W-30 motor oil — 6.1 quarts with a filter change, per the factory service manual.
Factory-spec answer
5W-30 — 6.1 quarts with filter
Oil capacity by engine
| Engine | Oil Type (viscosity) | Capacity w/ Filter | Capacity w/o Filter | Notes |
|---|---|---|---|---|
| Base, 2D Convertible | SAE 5W-30 (Below -20Deg.F to 35Deg.F), 10W-30 (Below -10Deg.F to Above 85Deg.F) 10W-40, 10W-50 (Below -10Deg.F to Above 120Deg.F) 20W-40, 20W-50 (Below 10Deg.F to Above 120Deg.F) | 6.10 QTS. | 4.70 QTS. | API - Service "Fuel Efficient" SF grade (Mineral Oil Only). |
| Base, 2D Coupe, Automatic | SAE 5W-30 (Below -20Deg.F to 35Deg.F), 10W-30 (Below -10Deg.F to Above 85Deg.F) 10W-40, 10W-50 (Below -10Deg.F to Above 120Deg.F) 20W-40, 20W-50 (Below 10Deg.F to Above 120Deg.F) | 6.10 QTS. | 4.70 QTS. | API - Service "Fuel Efficient" SF grade (Mineral Oil Only). |
| Base, 2D Coupe, Standard | SAE 5W-30 (Below -20Deg.F to 35Deg.F), 10W-30 (Below -10Deg.F to Above 85Deg.F) 10W-40, 10W-50 (Below -10Deg.F to Above 120Deg.F) 20W-40, 20W-50 (Below 10Deg.F to Above 120Deg.F) | 6.10 QTS. | 4.70 QTS. | API - Service "Fuel Efficient" SF grade (Mineral Oil Only). |
| GTU | SAE 5W-30 (Below -20Deg.F to 35Deg.F), 10W-30 (Below -10Deg.F to Above 85Deg.F) 10W-40, 10W-50 (Below -10Deg.F to Above 120Deg.F) 20W-40, 20W-50 (Below 10Deg.F to Above 120Deg.F) | 6.10 QTS. | 4.70 QTS. | API - Service "Fuel Efficient" SF grade (Mineral Oil Only). |
| GXL, Automatic | SAE 5W-30 (Below -20Deg.F to 35Deg.F), 10W-30 (Below -10Deg.F to Above 85Deg.F) 10W-40, 10W-50 (Below -10Deg.F to Above 120Deg.F) 20W-40, 20W-50 (Below 10Deg.F to Above 120Deg.F) | 6.10 QTS. | 4.70 QTS. | API - Service "Fuel Efficient" SF grade (Mineral Oil Only). |
| GXL, Standard | SAE 5W-30 (Below -20Deg.F to 35Deg.F), 10W-30 (Below -10Deg.F to Above 85Deg.F) 10W-40, 10W-50 (Below -10Deg.F to Above 120Deg.F) 20W-40, 20W-50 (Below 10Deg.F to Above 120Deg.F) | 6.10 QTS. | 4.70 QTS. | API - Service "Fuel Efficient" SF grade (Mineral Oil Only). |
| SE, Automatic | SAE 5W-30 (Below -20Deg.F to 35Deg.F), 10W-30 (Below -10Deg.F to Above 85Deg.F) 10W-40, 10W-50 (Below -10Deg.F to Above 120Deg.F) 20W-40, 20W-50 (Below 10Deg.F to Above 120Deg.F) | 6.10 QTS. | 4.70 QTS. | API - Service "Fuel Efficient" SF grade (Mineral Oil Only). |
| SE, Standard | SAE 5W-30 (Below -20Deg.F to 35Deg.F), 10W-30 (Below -10Deg.F to Above 85Deg.F) 10W-40, 10W-50 (Below -10Deg.F to Above 120Deg.F) 20W-40, 20W-50 (Below 10Deg.F to Above 120Deg.F) | 6.10 QTS. | 4.70 QTS. | API - Service "Fuel Efficient" SF grade (Mineral Oil Only). |
| Turbo | SAE 5W-30 (Below -20Deg.F to 35Deg.F), 10W-30 (Below -10Deg.F to Above 85Deg.F) 10W-40, 10W-50 (Below -10Deg.F to Above 120Deg.F) 20W-40, 20W-50 (Below 10Deg.F to Above 120Deg.F) | 6.10 QTS. | 4.70 QTS. | API - Service "Fuel Efficient" SF grade (Mineral Oil Only). |
Buy the right oil
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More specs & repair guides for your RX-7
1988 Mazda RX-7 factory service manualAll fluid capacities (transmission, coolant, brakes)Powered by factory manual data from our partner site AllOEMManuals.com.
Coolant capacity
9.2 quarts (8.7 L) — Ethylene Glycol Antifreeze Coolant
Frequently asked questions
What type of oil does a 1988 Mazda RX-7 take?
The 1988 Mazda RX-7 takes 5W-30 motor oil (SAE 5W-30 (Below -20Deg.F to 35Deg.F), 10W-30 (Below -10Deg.F to Above 85Deg.F) 10W-40, 10W-50 (Below -10Deg.F to Above 120Deg.F) 20W-40, 20W-50 (Below 10Deg.F to Above 120Deg.F)), per the factory service manual.
How much oil does a 1988 Mazda RX-7 take?
The 1988 Mazda RX-7 holds 6.1 quarts with a filter change, or 4.7 quarts without changing the filter.
Can I use synthetic oil in my 1988 Mazda RX-7?
Yes. 5W-30 is widely available as a full synthetic, and synthetic is safe (often recommended) for the 1988 Mazda RX-7. What matters most is matching the factory viscosity and specification, then changing the oil and filter on schedule.