When it comes to choosing the best engine oil for your Honda Unicorn 160, it's important to prioritize using an oil that meets the manufacturer's specifications and quality standards. Honda typically recommends oils that meet certain API (American Petroleum Institute) and JASO (Japanese Automotive Standards Organization) ratings. Among the brands you mentioned (Motul, Shell, Castrol, Veedol, and Valvoline), they all offer a range of oils that can meet those requirements.
If Motul and Shell oils are not available at your location, you can consider the other options you mentioned. Castrol, Veedol, and Valvoline are all reputable oil brands with a long history in the industry. Here are a few factors to consider when choosing among them:
Manufacturer Specifications: Check your Honda Unicorn 160's owner's manual or contact a Honda dealership to determine the recommended oil specifications. Look for oils that meet or exceed the specified API and JASO ratings.
Viscosity Grade: Consider the recommended viscosity grade for your motorcycle. It's common for the Honda Unicorn 160 to use 10W-30 or 10W-40 viscosity oils. Choose an oil with the appropriate viscosity grade for your riding conditions and climate.
Quality and Performance: Look for oils that offer good detergent and dispersant properties, high-temperature stability, and excellent lubrication characteristics. Oils from reputable brands tend to have undergone rigorous testing and quality control to ensure optimal performance and engine protection.
Price and Availability: Consider the price and availability of the oils in your area. Compare prices and check for any special offers or promotions that may be available. Ensure that the oil you choose is readily accessible so that you can maintain regular oil changes.
While personal preferences and experiences can vary, all the brands you mentioned have established themselves as trusted oil manufacturers. As long as you select an oil that meets the manufacturer's specifications and quality standards, you should be able to provide sufficient engine protection and performance for your Honda Unicorn 160.