Good to hear it’s working for you and your son. I use any name brand that’s on sale, but the sales around me often includes Magnatec, so I’m using Magnatec 5W30 right now. Unfortunately no QS stocked here, but we do get Shell Helix, which is good stuff.Good stuff. I actually had this 5 quart bottle for some time. It was hiding in my garage. More than likely though I'll go back to QSFS based on price, performance and local availability (the local Wally World keeps it in stock). For some reason the Magnatec has gone up in price in my area. But I do like the Magnatec. My son had a leased Subaru Impreza (now gone-I think this bottle was on hand before he traded away that car). The Magnatec was the only oil that didn't have any usage in that car. Everything else he ran burned off; some more than others.