* Viscosity: Look for an oil with a viscosity grade of 5W-20 or 5W-30. The 5W indicates its performance in cold temperatures, while the 20 or 30 indicates its performance at higher temperatures. Your owner's manual will specify which is recommended for your climate and driving conditions. Using a heavier oil (like 10W-30 or 10W-40) might be acceptable in extremely hot climates, but again, check your manual.
* Type: Use an oil meeting the API certification of at least SN (or better, such as SM, SN Plus, SP, or newer). The owner's manual will specify the recommended API certification.
* Synthetic vs. Conventional: Either synthetic or conventional oil meeting the specifications above is generally acceptable. Synthetic oil offers better performance and longevity, particularly in extreme temperatures. Conventional oil is generally less expensive.
Crucially: Consult your owner's manual. The specific oil recommendations (including viscosity and API certification) will be clearly stated in the owner's manual for your specific vehicle and year. This is the most accurate and reliable source of information. Ignoring the manufacturer's recommendations can void your warranty and potentially damage your engine.
