I did change yesterday, at the Honda dealer, the oil on my Honda
Element 2004.
I asked for Synthetic oil. They did change the oil.
Later I did noticed the oil they put was Castrol, Synthetic, 10W30.
In the Honda Element owner's manual is mentioned to use 5W20
Someone told me later for Synthetic oil I should use special filter
for synthetic oil.

My question is if Honda dealer did OK when they put Castrol oil
instead of genuine Honda oil and filter.

Any comments would be appreciated