* Conventional oil: SAE 10W-30 is usually the recommended viscosity for most climates. Check your owner's manual for confirmation.
* Oil type: Use a motor oil that meets the API certification of SF, SG, SH, SJ, SL, SM, SN, or SP. The newer designations (SM, SN, SP) indicate better performance and protection, but any of the listed certifications will be suitable. Look for this information on the oil bottle.
Important Considerations:
* Climate: In extremely hot climates, you might consider a 20W-40 weight oil, but 10W-30 is generally suitable for most. In extremely cold climates, 5W-30 might be better. Always consult your owner's manual.
* Owner's Manual: The most definitive answer is always in your vehicle's owner's manual. It may specify a particular oil weight or type based on your specific truck's configuration.
* Oil filter: Always use a quality oil filter, and change it every time you change your oil.
In summary: Start by checking your owner's manual. If you can't find it, a good starting point is using conventional 10W-30 oil meeting API certification of SF or higher.
