What oil does a 91 Integra take?
The 1991 Acura Integra generally uses 5W-30 motor oil, with 10W-30 as an alternative in hotter climates or when 5W-30 isn’t available. The engine holds roughly 3.7 quarts (about 3.5 liters) of oil with a filter.
Oil type and viscosity
Choosing the right viscosity and oil specification for the 1991 Integra matters for engine wear and performance. Here are common recommendations:
- Viscosity: 5W-30 is the standard recommendation for most climate zones.
- Alternative: 10W-30 can be used in hotter climates or if 5W-30 is unavailable.
- Oil type/spec: Use API SN or newer; ILSAC or equivalent ratings are acceptable. Synthetic or synthetic-blend 5W-30 is a popular option for improved protection and cold-start performance.
In practice, 5W-30 is the default choice, with 10W-30 reserved for specific conditions or availability.
Oil capacity and change intervals
Know the engine’s oil capacity and the recommended change intervals before performing maintenance.
- Capacity (with filter): approximately 3.7 quarts (3.5 liters); without the filter, it’s slightly less.
Always verify with the dipstick and add oil gradually to avoid overfilling. Regularly checking the level helps protect the engine.
Change intervals depend on the type of oil and driving conditions. Here are typical guidelines:
- Conventional oil: about every 3,000–5,000 miles (4,800–8,000 km) or every 3–6 months, whichever comes first.
- Synthetic or synthetic-blend oil: about every 5,000–7,500 miles (8,000–12,000 km) or every 6–12 months, whichever comes first.
Following these intervals helps maximize protection for the 1991 Integra’s engine and maintain optimal performance.
Brand and product recommendations
Choosing a brand and product that meets API SN or newer and the right viscosity is important for longevity. Consider reputable options and ensure the oil meets current specifications.
- 5W-30 API SN or newer (conventional or synthetic blend) is a typical default choice.
- Full-synthetic 5W-30 is a common option for improved protection and easier cold starts.
- Examples of widely available options include Mobil 1 (5W-30), Castrol (5W-30), Valvoline SynPower (5W-30), Pennzoil Platinum (5W-30), and Honda/Acura OEM-branded 5W-30 oils.
Any brand offering a 5W-30 oil that meets API SN or newer is suitable; always check the label for the exact specifications.
Oil change procedure (for a 1991 Integra)
Below are the standard steps for performing an oil change on a 1991 Integra. Gather the right tools and safety gear before you start.
- Park on level ground, chock the wheels, and warm the engine to operating temperature.
- Place a drain pan under the oil pan, remove the drain plug, and allow the old oil to drain completely.
- Remove the old oil filter, discard it, and prepare the new filter by lightly lubricating its gasket with fresh oil.
- Install the new filter by hand until snug, then give it a final gentle tighten. Do not over-tighten.
- Re-install the drain plug with a new washer if applicable, and tighten to a snug specification per the service manual.
- Pour in the new oil: add the recommended capacity (about 3.7 quarts with filter) in increments, then check the level with the dipstick.
- Start the engine and check for leaks. After a minute or so, re-check the oil level and top off as needed to reach the proper mark.
- Dispose of the old oil and filter at an authorized recycling facility.
Following proper steps and safety precautions ensures a clean, effective oil change and accurate oil level readings.
Frequently asked questions
Can I use synthetic oil in a 1991 Integra?
Yes. Synthetic oil can be used in the 1991 Integra and may offer better protection and temperature performance. Starting with a good 5W-30 synthetic or synthetic blend is common, and you should monitor oil level and engine performance as with any older vehicle.
How often should I change the oil on a 1991 Integra?
With conventional oil, aim for ~3,000 miles (4,800 km) or every 3–4 months if driving is light. With synthetic or synthetic-blend oil, 5,000–7,500 miles (8,000–12,000 km) or 6–12 months is typical, depending on driving conditions and climate.
Where can I find the exact capacity for my engine?
The exact capacity can vary slightly by engine variant and filter. Check the owner's manual, a factory service manual, or a reputable Honda/Acura parts database for your specific VIN. The commonly cited range for the 1991 Integra is roughly 3.5–3.7 quarts with filter.
Summary
For a 1991 Integra, the standard oil choice is 5W-30 that meets API SN or newer, with 10W-30 as a fallback in hot climates or when 5W-30 isn’t available. The engine’s oil capacity is about 3.7 quarts with a filter. Change intervals depend on whether you use conventional or synthetic oil, generally 3,000–5,000 miles for conventional oil and 5,000–7,500 miles for synthetic. Use a reputable brand and verify exact capacities and torque specs in the service manual, and dispose of used oil responsibly after each change. Regular oil checks are essential to keep the 1991 Integra running smoothly.
