Using engine oil SWG 20-50 instead of SWG 10- 30

[azharj]

Hi Dears,
I have Wndstar 2000 lx. Recently I changed crnk, crnk shaft bearing, piston rings of all cylinders, and all the valves. Previosly, I had been using SWG 10- 30 motorcraft engine oil. After repair (for 500 miles) I used SWG 20-50 castrol engine oil. Is it harmful to use this higher grade oil in this repaired engine.
Azharj

[wiswind]

You should use the grade that is called for in the owner's manual.
In USA terms.....that would be 5W-30 or 0W-30.
FORD also stated that it is fine to use 5W-20 or 0W-20.
Again, that is in USA terms.......I don't know what is called for where you are, but you should use what is called for.

[azharj]

thanks in my area ford company sells only motorcraft SWG 10-30 engine oil for all vehicles explorer focus fusion expedetion windstar and freestar etc.
Azhar jawaid