There is no universal rule that says synthetic motor oils should not be used in Honda vehicles. In fact, many Honda vehicles, including newer models, are designed to work well with synthetic motor oils. However, there may be a few reasons why some people might recommend against using synthetic oil in older Honda vehicles:
Maintenance History: Older Honda vehicles may have been used to conventional motor oils throughout their lifespan. Switching to synthetic oil after a long period of conventional oil usage might cause issues if there are existing seal or gasket leaks. Synthetic oils, with their different chemical composition and detergent properties, can potentially expose or worsen existing leaks, leading to oil seepage or consumption.
Cost Considerations: Synthetic motor oils are generally more expensive than conventional oils. Some Honda owners may opt for conventional oil due to cost considerations or because they believe it is sufficient for their driving needs.
It's important to note that these concerns are not exclusive to Honda vehicles and can apply to any older vehicle when considering a switch to synthetic oil. However, it's worth mentioning that synthetic oils have several advantages, such as better resistance to breakdown under high temperatures, improved lubrication properties, and extended oil change intervals. Synthetic oils can provide enhanced engine protection and performance benefits in many cases.
Ultimately, the decision to use synthetic or conventional oil depends on factors such as the vehicle's age, condition, driving habits, manufacturer recommendations, and personal preferences. It is always best to consult the owner's manual or seek guidance from a qualified mechanic to determine the most suitable oil type for your specific Honda vehicle.