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So my mechanic has put 5w30 the last two times in my truck. Now I think they are suppose run 5w20 do u think this could cause problems I'm running mobil 1 full synthetic
I seriously doubt that it hurt anything. Some engines that run 5w-20 regularly have a recommendation that 5w-30 be used under hard conditions (this was the case with my Tundra 5.7).
This. We run 15W40 in all of our vehicles (probably 20-30 total) and never any engine issues. May drop your mileage a tad but no worries. And these vehicles all get run hard and put away wet.
So my mechanic has put 5w30 the last two times in my truck. Now I think they are suppose run 5w20 do u think this could cause problems I'm running mobil 1 full synthetic
I'm with the others it won't hurt. I almost think Ford put 5w-20 in them just to eek out every last bit of MPGs... Under heavy use I would think 5w-30 would actually be better like Toyota recommends.