What is a key difference between synthetic and conventional oil?

Synthetic oil is formulated through a chemical process that creates a more uniform molecular structure compared to conventional oil, which is refined from crude oil. This precision in manufacturing allows synthetic oil to perform exceptionally well under extreme conditions, particularly at high temperatures.

When engine temperatures rise, synthetic oil maintains its viscosity better than conventional oil, reducing the likelihood of breakdown and ensuring that the engine components remain lubricated effectively. This characteristic is essential during demanding driving conditions, such as heavy towing or high-speed performance, where conventional oil may not provide adequate protection.

The other options lack the same level of relevance or accuracy. Synthetic oil may be more expensive initially, but its performance advantages often lead to longer intervals between oil changes, making it a more cost-effective choice in the long run. Additionally, conventional oil is primarily derived from crude oil, not natural gas, and synthetic oil typically allows for longer oil change intervals, contrary to the assertion that it requires more frequent changes.