10W-30 and 5W-30 are interchangeable in hot climates, as they are identical once warm. However, owners should stick to the recommended oil in cold weather.

Test your knowledge of how oil prices have been affected by previous crises in the Middle East ...

Check out our IOC stock chart to see a history of performance, current stock value, and a timeline of financial events & indicators for a full analysis today.

Every engine requires oil to function, though oil itself has changed a lot over the decades. It's no longer a bad idea to use synthetic oil in an older engine.

But gas prices have seen larger increases over the past week as the conflict created more uncertainty about the cost of oil. In addition to strife in the Middle East, seasonal trends are at play ...

Check out our OIL stock chart to see a history of performance, current stock value, and a timeline of financial events & indicators for a full analysis today.

This system utilizes a composite of dispersed particle gel (DPG) profile control agents and viscosity-reducers, achieving both the stable plugging of breakthrough channels and the synergistic effect ...

Additionally, the routine top-up of fresh oil during engine operation, needed to compensate for losses from evaporation and leakage, helps maintain a more stable overall oil viscosity. As a result, ...