I am using PP GTL 5W30 in a 2012 Accent which I change at 5k and my service tech at quicklane is uber impressed with how clean my engine and fill cap look. I was not a pennzoil guy to start(M1 5w30) but it has done very well. I think it is actually better per dollar than PUP. I drive 5000 miles every two weeks and though all highway, it has held up quite well. I will continue to use PP 5W30 until 200k then switch to M1 HM 5w30. I have also added 90ml of mos2 from liquimoly as I have used it since 10,000 miles and the more I use it the less it needs. When I check my throttle plate there is no residue either. I would however consider QSUD in a pinch without a problem but so far PP has served me well. Right now I am on PU because I found some on clearance, but its hardly available in the new form, but the old stuff runs similiar to the redline I used before, like a champ. If you have DI engine like I do then a low noack synthetic oil with redline si-1 fuel cleaner does the trick. I am currently cleaning throttle every 10k w/ Crc GDI cleaner with positive results.