New to this site. And I have a 09 ranger with a 4.0 in it and 80,000 miles on it . I change the oil myself evey 3000 mile with a syn-blend oil from the beginning. On my last oil change I changed to a full syn. oil Mobil 1 and I stared to hear my lifters ticking . Is this normal in rangers with full syn oil in then? I do not think ford makes a full syn oil. is it safe in the truck. a friend said it may be the oil pump any ideas on this?

 

I have an 08 4.0 with 81k on it, and run a full synthetic 5W-30 oil with no problems. Shouldn't be any problems running a full synthetic oil.