NCSU dirt man
New member
Last oil change I took the offer of a friend who recently sold his powerstroke and bought his overstock of Amsoil off of him for dirt cheap and changed my oil like usual. Long story short I didn't realize it was a synthetic. We've always run Rotella in our trucks without issue and I'd like to keep it that way with Motorcraft filters. My question is this; at 95k miles on the truck and having recently only done the last oil change at about 5k miles ago with the Amsoil synthetic (just this once) can I still switch back to basic Shell Rotella still or is it too late? I don't mind paying a little more but it looks like synthetic oil is almost twice as much for the Shell Rotella synthetic. Any help on this I'd appreciate it
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