When it comes to selecting the right engine oil for your motorcycle, it's important to consider the manufacturer's recommendations as well as the climate conditions in your country. The recommended oil viscosity for your Indo CBR 150R is 10W30, which is suitable for normal operating conditions.
A higher viscosity oil can offer better protection against heat and provide improved lubrication under extreme conditions.
While using 10W40 oil may be acceptable in hotter climates, it's important to note that deviating from the manufacturer's recommendations could potentially impact the performance and longevity of your engine. It's always a good idea to consult with a qualified mechanic or refer to the motorcycle's owner manual for specific guidance.
Additionally, be mindful of the potential impact of using a higher viscosity oil on fuel efficiency, as it may result in a slight decrease. If you decide to switch to 10W40, make sure to monitor your motorcycle's performance and engine temperature closely to ensure it's running optimally.
Ultimately, it's best to strike a balance between the manufacturer's recommendations and the prevailing climatic conditions. If you have concerns or questions, it's advisable to consult a local motorcycle expert or the manufacturer for tailored advice.