That being said, for a regular city driver, you'll typically want to choose an engine oil with the appropriate viscosity and specifications recommended by Royal Enfield. Here are some general considerations:
Viscosity: Look for an engine oil with the recommended viscosity grade specified in your owner's manual. The Classic 350 BSIV typically requires a 15W-50 or 20W-50 viscosity grade oil.
API Specification: Check for the American Petroleum Institute (API) specification recommended by Royal Enfield. Typically, API SN or higher is suitable for most modern motorcycles.
JASO Specification: Royal Enfield motorcycles often require engine oils that meet the JASO MA or MA2 specification. JASO MA oils are specifically designed for motorcycles with a wet clutch system like the Classic 350.
Brand and Quality: Opt for reputable brands that have a proven track record in the motorcycle industry. High-quality oils from manufacturers such as Castrol, Motul, Shell, and Mobil are commonly used in motorcycles.
Remember, regular oil changes are crucial for maintaining the performance and longevity of your motorcycle's engine. Follow the recommended intervals mentioned in the owner's manual and ensure you use the appropriate amount of oil as specified.
It's always best to double-check with a Royal Enfield authorized service center or consult the owner's manual for precise recommendations for your specific motorcycle model.