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

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

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.

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