if you really want to mail order go
https://www.fcpeuro.com/ has free shipping
and pay with paypal.
then next oil change you return your oil for "lifetime warranty" (Oil filter too)
get free new oil.. oh and the paypal you get free return shipping.. for using it.
I was only linking amazon because the mobil 1 site takes 60s to load for me... so I used the amazon product link.