When should you change from conventional oil to synthetic?

You should consider switching from conventional oil to synthetic oil if you frequently drive in extreme temperatures, engage in stop-and-go traffic, or have a high-performance engine. Synthetic oil offers better protection, improved fuel efficiency, and longer intervals between oil changes. Additionally, if your vehicle manufacturer recommends synthetic oil or if you have a newer model, it might be beneficial to make the switch for enhanced engine performance. Always consult your owner's manual for specific recommendations.