Spec oil for the engine is 5w-30 with 10w-30 listed for warmer climates. The engine has 160k miles and isn't as smooth sounding as it used to be. I've been running Walmart's SuperTech 10w-30 high mileage formula for the past 50k miles and wondering if it would hurt anything to use Rotella-T 5w-40 synthetic so I can use the same as my 6.0L Powerstroke. Please let me know your thoughts!
Also, I plan to drop the pan soon and do rod bearings, would a thinner or thicker oil be best to break in the new bearings?
Thanks!
Also, I plan to drop the pan soon and do rod bearings, would a thinner or thicker oil be best to break in the new bearings?
Thanks!