ThortheViking

Just looked at the receipt and noticed the guy put in 0w20 instead of the 5w20.

How bad is that?

Mod (Ret.)

What climate zone do you live in?

Not bad, but I'd be taking it back and having them re-fill it with what the owners manual states, and at their cost of course.

Don't have an owners manual? Download one for free here and show it to them:

https://www.fleet.ford.com/maintenan...ls/default.asp

ThortheViking

Iceland but its in the 50s right now.

slghtr2000

My company uses nothing but Fords And all our vans have 5.4's in them. They only use 0w-20 oil in them and never have I heard one make any noise or anything. We usually ha e little to no problems for 100,000 miles. Get new ones at 100k. We carry a whole lot of weight in them and only do oil changes like 3 times a year. And drive an hour or so each way to work every day. Ours run fine. The trucks we have are the same

DangFoo

No, the 0w20 won't hurt your engine, but I don't believe you need to run that viscosity/grade in colder climates either. We may have some Alaskans and Canadians here that can add their experience at a somewhat similar latitude. Reykjavik and Nome, AK are of similar latitude, though I realize that's not the absolute determination for weather/climate; just thinking owners in similar cooler climates might lend their insight.

I've always adhered to the factory recommendations and that translates to 5w20 from an all-season standpoint. Thus, I recommend going back to have them perform the change-out.

This is just one reason why I change my own oil; don't like having other folks touch my cars/trucks unless it's beyond my mechanical means and/or comprehension.

ThortheViking

Thanks Dang, I'll just change it out.

Icelands very mild considering how far north we are, We rarely dip below -5 celcius in winter, and it rains much more than it ever snows here.