The Rincon 680 uses SAE 10W-40 engine oil and 80W-90 GL-5 gear oil for the differentials. Always check the owner's manual for exact capacities and any climate-based variations.
Engine oil requirements
Engine oil lubricates the Rincon 680’s four-stroke engine and helps the clutch operate smoothly. The following options are commonly recommended by Honda and ATV lubricant manufacturers:
- SAE 10W-40 API SJ/SL or newer, with Honda GN4 10W-40 being a typical specification
- Full-synthetic 10W-40 is acceptable, especially in hot climates or for high-mileage engines
- Use oil that meets API SL/SJ/SM or newer and Honda-specific recommendations to maintain warranty compliance
Engine oil capacity and fill level depend on model year and whether the filter is replaced; typical figures are around 2.3 quarts (about 2.2 liters) with the filter. Always refer to the service manual for exact quantities and procedures.
Gear oil and differential lubrication
The Rincon 680’s drive system uses separate gear oil for the front and rear differentials. Use a GL-5 rated gear oil in the appropriate viscosity for your riding conditions:
- Front differential gear oil: 80W-90 GL-5
- Rear differential gear oil: 80W-90 GL-5
- Follow the manual’s intervals and check for metal shavings or contamination during changes
Gear oil capacities vary by year and model variant; consult the owner’s or service manual for exact quantities and the recommended change schedule.
Climate and maintenance considerations
Viscosity choices should reflect climate and riding style. In temperate conditions, SAE 10W-40 is a solid baseline; in hotter climates, some riders opt for slightly higher-viscosity oils, while very cold environments may warrant lighter variants. Always use oils that meet API standards and Honda’s specifications, and never mix different oil types. Regular oil and filter changes are essential for longevity.
Summary
For a Honda Rincon 680, use SAE 10W-40 engine oil (preferably Honda GN4 10W-40 or an equivalent API SN/SM or newer option) and 80W-90 GL-5 gear oil for the front and rear differentials. Check the exact capacities and any climate-specific recommendations in the owner’s manual. Regular maintenance, including timely oil changes and filter replacements, is key to reliable performance.