* Performance Differences: Synthetic oils are engineered for superior performance in several key areas: higher temperature stability, better viscosity index (maintains viscosity across a wider temperature range), enhanced resistance to breakdown, and better cleaning properties. These properties are crucial for engines designed for synthetic oil.
* Manufacturer Specifications: When a manufacturer specifies fully synthetic oil, it's because the engine's design, tolerances, and operating conditions demand those superior characteristics. Using a lower-performing oil can lead to:
* Increased wear: Non-synthetic oil may not provide adequate lubrication under high stress or high temperature conditions, resulting in increased friction and wear on engine components.
* Deposit buildup: Non-synthetic oil may not effectively clean the engine, leading to the accumulation of sludge and varnish, which can clog oil passages and restrict oil flow.
* Reduced fuel efficiency: Increased friction translates to decreased fuel efficiency.
* Premature engine failure: The cumulative effect of increased wear and deposit buildup can lead to premature engine failure.
* Warranty Implications: Using the wrong type of oil will likely void any engine warranty.
In short: It's crucial to follow the manufacturer's recommendations for oil type. Using non-synthetic oil in an engine that requires synthetic oil is risky and could lead to significant and expensive engine damage. Always check your owner's manual for the correct oil specifications.
