1990 Geo Storm Oil Type & Capacity
The 1990 Geo Storm oil type depends on the engine: the Base, Automatic, F3A/MX1 takes 5W-30 (3.5 quarts with filter); the Base, Automatic, JF-403E takes 5W-30 (3.5 quarts with filter); the Base, Standard takes 5W-30 (3.5 quarts with filter); the GSi, Automatic, F3A/MX1 takes 5W-30 (4.2 quarts with filter); the GSi, Automatic, JF-403E takes 5W-30 (4.2 quarts with filter); the GSi, Standard takes 5W-30 (4.2 quarts with filter), per the factory service manual.
Factory-spec answer
It depends on the engine:
- Base, Automatic, F3A/MX1: 5W-30, 3.5 quarts with filter
- Base, Automatic, JF-403E: 5W-30, 3.5 quarts with filter
- Base, Standard: 5W-30, 3.5 quarts with filter
- GSi, Automatic, F3A/MX1: 5W-30, 4.2 quarts with filter
- GSi, Automatic, JF-403E: 5W-30, 4.2 quarts with filter
- GSi, Standard: 5W-30, 4.2 quarts with filter
Oil capacity by engine
| Engine | Oil Type (viscosity) | Capacity w/ Filter | Capacity w/o Filter | Notes |
|---|---|---|---|---|
| Base, Automatic, F3A/MX1 — Eng VIN 6 | SAE 5W-30 (Below -20Deg.F to above 100Deg.F), 10W-30 (Preferred) (Above 0Deg.F) | 3.50 QTS. | 3.50 QTS. | Use oil that has been certified by the American Petroleum Institute. |
| Base, Automatic, JF-403E — Eng VIN 6 | SAE 5W-30 (Below -20Deg.F to above 100Deg.F), 10W-30 (Preferred) (Above 0Deg.F) | 3.50 QTS. | 3.50 QTS. | Use oil that has been certified by the American Petroleum Institute. |
| Base, Standard — Eng VIN 6 | SAE 5W-30 (Below -20Deg.F to above 100Deg.F), 10W-30 (Preferred) (Above 0Deg.F) | 3.50 QTS. | 3.50 QTS. | Use oil that has been certified by the American Petroleum Institute. |
| GSi, Automatic, F3A/MX1 — Eng VIN 5 | SAE 5W-30 (Below -20Deg.F to above 100Deg.F), 10W-30 (Preferred) (Above 0Deg.F) | 4.20 QTS. | 3.80 QTS. | Use oil that has been certified by the American Petroleum Institute. |
| GSi, Automatic, JF-403E — Eng VIN 5 | SAE 5W-30 (Below -20Deg.F to above 100Deg.F), 10W-30 (Preferred) (Above 0Deg.F) | 4.20 QTS. | 3.80 QTS. | Use oil that has been certified by the American Petroleum Institute. |
| GSi, Standard — Eng VIN 5 | SAE 5W-30 (Below -20Deg.F to above 100Deg.F), 10W-30 (Preferred) (Above 0Deg.F) | 4.20 QTS. | 3.80 QTS. | Use oil that has been certified by the American Petroleum Institute. |
Buy the right oil
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More specs & repair guides for your Storm
1990 Geo Storm factory service manualAll fluid capacities (transmission, coolant, brakes)Powered by factory manual data from our partner site AllOEMManuals.com.
Coolant capacity
7.6 quarts (7.19 L) — 50/50 mixture of Ethylene Glycol Base Antifreeze and water. GM Specification 1825-M.
Frequently asked questions
What type of oil does a 1990 Geo Storm take?
It depends on the engine: Base, Automatic, F3A/MX1 uses 5W-30; Base, Automatic, JF-403E uses 5W-30; Base, Standard uses 5W-30; GSi, Automatic, F3A/MX1 uses 5W-30; GSi, Automatic, JF-403E uses 5W-30; GSi, Standard uses 5W-30.
How much oil does a 1990 Geo Storm take?
Capacity depends on the engine: Base, Automatic, F3A/MX1 holds 3.5 quarts with filter; Base, Automatic, JF-403E holds 3.5 quarts with filter; Base, Standard holds 3.5 quarts with filter; GSi, Automatic, F3A/MX1 holds 4.2 quarts with filter; GSi, Automatic, JF-403E holds 4.2 quarts with filter; GSi, Standard holds 4.2 quarts with filter.
Can I use synthetic oil in my 1990 Geo Storm?
Yes. 5W-30 is widely available as a full synthetic, and synthetic is safe (often recommended) for the 1990 Geo Storm. What matters most is matching the factory viscosity and specification, then changing the oil and filter on schedule.