1991 Lexus LS 400 Oil Type & Capacity: 5W-30 (5.3 quarts)
The 1991 Lexus LS 400 takes 5W-30 motor oil — 5.3 quarts with a filter change, per the factory service manual.
Factory-spec answer
5W-30 — 5.3 quarts with filter
Oil capacity by engine
| Engine | Oil Type (viscosity) | Capacity w/ Filter | Capacity w/o Filter | Notes |
|---|---|---|---|---|
| LS 400 — 4.0L Eng | API - SAE 5W-30 (Preferred) (Below 100Deg.F), 10W-30 (Above 0Deg.F) | 5.30 QTS. | 5.00 QTS. | — |
More factory specs & repair guides for your LS 400
🛞 1991 Lexus LS 400 Tire Size & Pressure →🌧️ 1991 Lexus LS 400 Wiper Blade Sizes →💡 1991 Lexus LS 400 Light Bulb Sizes →📖 1991 Lexus LS 400 Factory Service Manual →All fluid capacities (transmission, coolant, brakes)Powered by factory manual data from our partner network AllOEMManuals.com.
Coolant capacity
11.2 quarts (10.59 L) — 50/50 mixture of Ethylene Glycol Antifreeze and water. DO NOT use alcohol type antifreeze or plain water alone.
Frequently asked questions
What type of oil does a 1991 Lexus LS 400 take?
The 1991 Lexus LS 400 takes 5W-30 motor oil (API - SAE 5W-30 (Preferred) (Below 100Deg.F), 10W-30 (Above 0Deg.F)), per the factory service manual.
What is the oil capacity of a 1991 Lexus LS 400?
The 1991 Lexus LS 400 oil capacity is 5.3 quarts with a filter change, or 5.0 quarts without changing the filter.
How often should I change the oil in my 1991 Lexus LS 400?
Most 1991 Lexus LS 400 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 — Lexus recommends intervals based on driving conditions, not just mileage.
Can I use synthetic oil in my 1991 Lexus LS 400?
Yes. 5W-30 is widely available as a full synthetic, and synthetic is safe (often recommended) for the 1991 Lexus LS 400. What matters most is matching the factory viscosity and specification, then changing the oil and filter on schedule.