1985 Chevrolet S10 Blazer Oil Type & Capacity
The 1985 Chevrolet S10 Blazer oil type depends on the engine: the 2.5 E, 4WD, Automatic takes 10W-30 (3.0 quarts qt with filter); the 2.5 E, 4WD, Standard, MC9 takes 10W-30 (3.0 quarts qt with filter); the 2.5 E, 4WD, Standard, ML2 takes 10W-30 (3.0 quarts qt with filter); the 2.5 E, RWD, Automatic takes 10W-30 (3.0 quarts qt with filter); the 2.5 E, RWD, Standard, MC9 takes 10W-30 (3.0 quarts qt with filter); the 2.5 E, RWD, Standard, ML3 takes 10W-30 (3.0 quarts qt with filter); the 2.8 B, 4WD, Automatic takes 5W-30 (3.0 quarts qt with filter); the 2.8 B, 4WD, Standard, MB1 takes 5W-30 (3.0 quarts qt with filter); the 2.8 B, 4WD, Standard, MC9 takes 5W-30 (3.0 quarts qt with filter); the 2.8 B, RWD, Automatic takes 5W-30 (3.0 quarts qt with filter); the 2.8 B, RWD, Standard, MB1 takes 5W-30 (3.0 quarts qt with filter); the 2.8 B, RWD, Standard, MC9 takes 5W-30 (3.0 quarts qt with filter), per the factory service manual.
Factory-spec answer
It depends on the engine:
- 2.5 E, 4WD, Automatic: 10W-30, 3.0 quarts with filter
- 2.5 E, 4WD, Standard, MC9: 10W-30, 3.0 quarts with filter
- 2.5 E, 4WD, Standard, ML2: 10W-30, 3.0 quarts with filter
- 2.5 E, RWD, Automatic: 10W-30, 3.0 quarts with filter
- 2.5 E, RWD, Standard, MC9: 10W-30, 3.0 quarts with filter
- 2.5 E, RWD, Standard, ML3: 10W-30, 3.0 quarts with filter
- 2.8 B, 4WD, Automatic: 5W-30, 3.0 quarts with filter
- 2.8 B, 4WD, Standard, MB1: 5W-30, 3.0 quarts with filter
- 2.8 B, 4WD, Standard, MC9: 5W-30, 3.0 quarts with filter
- 2.8 B, RWD, Automatic: 5W-30, 3.0 quarts with filter
- 2.8 B, RWD, Standard, MB1: 5W-30, 3.0 quarts with filter
- 2.8 B, RWD, Standard, MC9: 5W-30, 3.0 quarts with filter
Oil capacity by engine
| Engine | Oil Type (viscosity) | Capacity w/ Filter | Capacity w/o Filter | Notes |
|---|---|---|---|---|
| 2.5 E, 4WD, Automatic — 2.5L Eng | SAE 10W-30 (Below 0Deg.F to 60Deg.F), 15W-40 (0Deg.F to Above 100Deg.F), SAE 30 (Above 32Deg.F to Above 100Deg.F) | 3.00 QTS. | — | — |
| 2.5 E, 4WD, Standard, MC9 — 2.5L Eng | SAE 10W-30 (Below 0Deg.F to 60Deg.F), 15W-40 (0Deg.F to Above 100Deg.F), SAE 30 (Above 32Deg.F to Above 100Deg.F) | 3.00 QTS. | — | — |
| 2.5 E, 4WD, Standard, ML2 — 2.5L Eng | SAE 10W-30 (Below 0Deg.F to 60Deg.F), 15W-40 (0Deg.F to Above 100Deg.F), SAE 30 (Above 32Deg.F to Above 100Deg.F) | 3.00 QTS. | — | — |
| 2.5 E, RWD, Automatic — 2.5L Eng | SAE 10W-30 (Below 0Deg.F to 60Deg.F), 15W-40 (0Deg.F to Above 100Deg.F), SAE 30 (Above 32Deg.F to Above 100Deg.F) | 3.00 QTS. | — | — |
| 2.5 E, RWD, Standard, MC9 — 2.5L Eng | SAE 10W-30 (Below 0Deg.F to 60Deg.F), 15W-40 (0Deg.F to Above 100Deg.F), SAE 30 (Above 32Deg.F to Above 100Deg.F) | 3.00 QTS. | — | — |
| 2.5 E, RWD, Standard, ML3 — 2.5L Eng | SAE 10W-30 (Below 0Deg.F to 60Deg.F), 15W-40 (0Deg.F to Above 100Deg.F), SAE 30 (Above 32Deg.F to Above 100Deg.F) | 3.00 QTS. | — | — |
| 2.8 B, 4WD, Automatic — 2.8L Eng | SAE 5W-30 (Below -20Deg.F to 100Deg.F), 10W-30 (Above 0Deg.F to over 100Deg.F), 15W-40 (10Deg.F to over 100Deg.F), 20W-20 (20Deg.F to over 100Deg.F), SAE 30 (40Deg.F to | 3.00 QTS. | — | — |
| 2.8 B, 4WD, Standard, MB1 — 2.8L Eng | SAE 5W-30 (Below -20Deg.F to 100Deg.F), 10W-30 (Above 0Deg.F to over 100Deg.F), 15W-40 (10Deg.F to over 100Deg.F), 20W-20 (20Deg.F to over 100Deg.F), SAE 30 (40Deg.F to | 3.00 QTS. | — | — |
| 2.8 B, 4WD, Standard, MC9 — 2.8L Eng | SAE 5W-30 (Below -20Deg.F to 100Deg.F), 10W-30 (Above 0Deg.F to over 100Deg.F), 15W-40 (10Deg.F to over 100Deg.F), 20W-20 (20Deg.F to over 100Deg.F), SAE 30 (40Deg.F to | 3.00 QTS. | — | — |
| 2.8 B, RWD, Automatic — 2.8L Eng | SAE 5W-30 (Below -20Deg.F to 100Deg.F), 10W-30 (Above 0Deg.F to over 100Deg.F), 15W-40 (10Deg.F to over 100Deg.F), 20W-20 (20Deg.F to over 100Deg.F), SAE 30 (40Deg.F to | 3.00 QTS. | — | — |
| 2.8 B, RWD, Standard, MB1 — 2.8L Eng | SAE 5W-30 (Below -20Deg.F to 100Deg.F), 10W-30 (Above 0Deg.F to over 100Deg.F), 15W-40 (10Deg.F to over 100Deg.F), 20W-20 (20Deg.F to over 100Deg.F), SAE 30 (40Deg.F to | 3.00 QTS. | — | — |
| 2.8 B, RWD, Standard, MC9 — 2.8L Eng | SAE 5W-30 (Below -20Deg.F to 100Deg.F), 10W-30 (Above 0Deg.F to over 100Deg.F), 15W-40 (10Deg.F to over 100Deg.F), 20W-20 (20Deg.F to over 100Deg.F), SAE 30 (40Deg.F to | 3.00 QTS. | — | — |
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More factory specs & repair guides for your S10 Blazer
🛞 1985 Chevrolet S10 Blazer Tire Size & Pressure →🌧️ 1985 Chevrolet S10 Blazer Wiper Blade Sizes →💡 1985 Chevrolet S10 Blazer Light Bulb Sizes →📖 1985 Chevrolet S10 Blazer Factory Service Manual →All fluid capacities (transmission, coolant, brakes)Powered by factory manual data from our partner network AllOEMManuals.com.
Coolant capacity
12.0 quarts (11.35 L) — 50/50 mixture of Ethylene Glycol Base Antifreeze and water. GM Specification 1825-M.
Frequently asked questions
What type of oil does a 1985 Chevrolet S10 Blazer take?
It depends on the engine: 2.5 E, 4WD, Automatic uses 10W-30; 2.5 E, 4WD, Standard, MC9 uses 10W-30; 2.5 E, 4WD, Standard, ML2 uses 10W-30; 2.5 E, RWD, Automatic uses 10W-30; 2.5 E, RWD, Standard, MC9 uses 10W-30; 2.5 E, RWD, Standard, ML3 uses 10W-30; 2.8 B, 4WD, Automatic uses 5W-30; 2.8 B, 4WD, Standard, MB1 uses 5W-30; 2.8 B, 4WD, Standard, MC9 uses 5W-30; 2.8 B, RWD, Automatic uses 5W-30; 2.8 B, RWD, Standard, MB1 uses 5W-30; 2.8 B, RWD, Standard, MC9 uses 5W-30.
What is the oil capacity of a 1985 Chevrolet S10 Blazer?
Oil capacity depends on the engine: 2.5 E, 4WD, Automatic holds 3.0 quarts with filter; 2.5 E, 4WD, Standard, MC9 holds 3.0 quarts with filter; 2.5 E, 4WD, Standard, ML2 holds 3.0 quarts with filter; 2.5 E, RWD, Automatic holds 3.0 quarts with filter; 2.5 E, RWD, Standard, MC9 holds 3.0 quarts with filter; 2.5 E, RWD, Standard, ML3 holds 3.0 quarts with filter; 2.8 B, 4WD, Automatic holds 3.0 quarts with filter; 2.8 B, 4WD, Standard, MB1 holds 3.0 quarts with filter; 2.8 B, 4WD, Standard, MC9 holds 3.0 quarts with filter; 2.8 B, RWD, Automatic holds 3.0 quarts with filter; 2.8 B, RWD, Standard, MB1 holds 3.0 quarts with filter; 2.8 B, RWD, Standard, MC9 holds 3.0 quarts with filter.
How often should I change the oil in my 1985 Chevrolet S10 Blazer?
Most 1985 Chevrolet S10 Blazer owners follow a 5,000–7,500 mile interval with conventional oil, or up to 10,000 miles with full synthetic. Always check the oil life monitor if equipped, and consult your owner's manual — Chevrolet recommends intervals based on driving conditions, not just mileage.
Can I use synthetic oil in my 1985 Chevrolet S10 Blazer?
Yes. 10W-30 is widely available as a full synthetic, and synthetic is safe (often recommended) for the 1985 Chevrolet S10 Blazer. What matters most is matching the factory viscosity and specification, then changing the oil and filter on schedule.