We bought a Honda Pilot a few months back. I took it to the dealer for its first oil change as we had a free oil change coupon. In both the owners manual and the service manual is tells me to use 5W-20 oil. It does not give a choice of viscosities for different temperatures. It says use 5W-20. I was surprised when the dealer used 5W-30 (of unknown brand) Now I know this did not do any harm but I thought why would the Honda Engineers specify 5W-20 and then the dealer use 5W-30? I did a little research and found this document EPA .pdf doc Any comments?