What oil for new reman 5.4 2 valve?

werstlna

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Installing a reman engine with 0 miles into a '03 Expedition. Engine builder says just put 5w20 conventional in and change it with new filter at 500 miles. No need for anything but conventional 5w20 he says. What do the omniscient posters of SVTP say?
 

Weather Man

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I lived in Tucson. I would break it in with conventional 5w20, then switch to synthetic 5w20 of choice.
 

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