If I was worried about following the service interval and having to change every 3750 miles on my Hyundai, I would use ST conventional if I was buying oil full price.
I would also look at Rural King oil if available in your area, somebody said conventional is like $8/jug right now.
As said, if you plan ahead, you can usually get 2 jugs of Mobil 1 and 2 jugs of Pennzoil Platinum every 6 months for the same price (after rebate) or less as ST conventional.
For my Hyundai GDI, I am doing a 5,000 mile/6 month OCI from my stash with cheap synthetics from clearance/rebates.
I would also look at Rural King oil if available in your area, somebody said conventional is like $8/jug right now.
As said, if you plan ahead, you can usually get 2 jugs of Mobil 1 and 2 jugs of Pennzoil Platinum every 6 months for the same price (after rebate) or less as ST conventional.
For my Hyundai GDI, I am doing a 5,000 mile/6 month OCI from my stash with cheap synthetics from clearance/rebates.