5W-30 motor oil, about 6.5 quarts with the filter, is the typical specification for the 1999 4Runner.
The 1999 4Runner came with the 5VZ-FE 3.4-liter V6. For this engine, Toyota generally recommends a viscosity of 5W-30 for normal driving, with 10W-30 as an acceptable alternative in hotter climates or if 5W-30 is not available. You can use conventional oil or a synthetic blend, and oil must meet API service categories such as SN or higher for best compatibility.
Oil grade and specifications
Below are the standard grade and compatibility options commonly used for this model.
- Viscosity: 5W-30 is the primary recommendation; 10W-30 is acceptable in warmer climates or if 5W-30 is unavailable.
- Oil type: Conventional, synthetic-blend, or full synthetic oils are all acceptable as long as they meet the API service requirements.
- Oil specification: Look for oils that meet API SN or higher and ILSAC GF-3/4/5 compatibility as applicable to your region and manual.
Using the recommended viscosity and API rating helps ensure proper lubrication, fuel efficiency, and engine protection across temperature ranges.
Oil capacity and change interval
Know how much oil the engine holds and when to change it helps plan maintenance visits.
- Capacity: Approximately 6.5 quarts (about 6.2 liters) of oil with a new filter for the 5VZ-FE engine in the 1999 4Runner.
- Change interval: With conventional oil, many owners follow around every 3,000 miles (4,800 km); with synthetic or synthetic-blend oils, intervals commonly extend to 5,000–7,500 miles (8,000–12,000 km) depending on driving conditions and manufacturer guidance.
Always check the dipstick to verify correct oil level and ensure the filter is properly installed during an oil change.
Summary
For a 1999 Toyota 4Runner, use 5W-30 motor oil (conventional or synthetic-blend) in a volume of about 6.5 quarts with filter, and follow appropriate change intervals based on oil type and driving conditions. Confirm the exact specification in your owner’s manual or on the oil filler cap, as there can be minor variations by market or trim.