Synthetic oil is refined, distilled, purified and broken down into its basic molecules, removing more impurities from the oil and allowing the individual molecules to meet the demands of modern engines. As a result, synthetic oil is superior to regular oil in its form and function, especially when it comes to longevity and durability in extreme conditions.
The drawback is that synthetic oil is also more expensive, and can cost as much as twice the amount of regular oil. There are several variables to consider whether it is worth the extra cost to get the better quality or not:
- Environmental. Both are pretty much equal when it comes to harming the environment, but because synthetic oil lasts far longer than regular oil, you will be disposing of far less over the same amount of time.
- Volatility. Modern synthetic oil is created in laboratories rather than in nature, and as a result they have proven to have cleaner composition and a lower level of volatility, so it does not vaporize out of the exhaust as much.
- Performance. Synthetic oil is only really recommended for higher performance cars, as they generate higher heat buildup in the engine, whereas regular every-day cars do not need anything special to operate optimally.
In the end the decision is up to the individual. But if you want to be on the safe side, follow what type of oil is recommended by the manufacturer for your specific car.