Yes. Make sure you use it in mild weather. You can use it in the summer and winters that are mild. If you live in very cold regions go to a lesser viscosity such as 5W-30 oil.
Change the oil.
10w30
It means its time to change the oil.
Auto Transmission Fluid
Honda ATF if Auto(don't use Dexron/Mercon) and 10w30 oil or Honda manual Trans fluid(which is fancy 10w30)
Is it required to change the crush washer on the engine oil pan drain plug
According to my 2006 LX Honda pilot manual, 4.5 qrts of oil. I change mine every 3 to 4k miles.
This depends on the year and model of your Honda Pilot. Check your Owner's manual that goes with the vehicle..
10w30
SAE 10w30
10W30 or 10W40 motorcycle oil is recommended by Honda.
Oil change and tire rotation.