Valvoline "conventional" 5w20/30 has been a synblend for a few years now. I believe the jug/label was changed with it went to SN+ and adverstised it being synblend.
I have a few jugs of that conventional that was on sale at WM during Black Friday in Canada two years ago. At the time it was under $12 Canadian. With the Exchange rate that was $9.24 USD before taxes. Needless to say I picked up 6 jugs at the time.
2015 Grand Caravan SXT Plus 0w-20 Pennzoil Ultra/Fram Ultra Filter 1997 Honda Civic CX 5w-30 PPPP/Fram Ultra Filter