Hi All
Just spoke to my Amsoil rep. Asked what he would recommend for my 2004 ,5.4 . The only 5w20 they have is in their XL line (cheaper).
He suggested a oil viscosity that just came out 0w20 , said this is a premium oil far better than their xl line and will work just fine.

Anyone using this oil ? Can I run 0w20?

 

I have been running mobil 0w20 for 35,000 miles with no problem.

 

Im in Petawawa, near Ottawa, and 0w20 is the accepted replacement for th e5w20 that comes in the trucks. The Ford 5w20 is semi-synthetic and I cant speak for the US, but in Canada, there heve been quite a few problems with the newer 5.4 and 4.6L engines if the get regular mineral oil. A lot of people are using 0w20 synthetic and it seems to work well.

 

on my 04- 75 k miles on the 0-30 & amsoil ea filter-once a year change- went to the 0-20 when it came out- zero problems-been using 030 in all my vehicles since it's release- no problems whatsoever-phil

 

Thanks guys thats what I wanted to hear.

 

I think the only concern on these newer engines is going with a thicker oil.

 

45K miles on Amsoil 0w-30 here

 

I've been thinking the same thing. . tolerances are tight enough now a days.

 

go with whatever amsoil recommends, I am a dealer/distributor as well, and whatever amsoil recommends is THE BEST for your vehicle.