5-Qt Mobil 1 Extended Performance 0W-20 Full Synthetic $3.85 after rebate
 

Walmart has this oil on sale for cheap ($15.85) and this could be used with the mobil1 $12 rebate, to bring it down to $3.85. here is the walmart link. https://www.walmart.com/ip/36019107?...ype=10&veh=aff
And her is the mobil1 rebate link. https://mobiloil.com/en/promotion/mo...nd-mobil-super
P.S. walmart is not shown as an eligible retailer on the mobil1 website, but I have never had a problem getting the rebate. YMMV.