Mobil 1 is still my preferred synthetic oil brand overall, especially off the shelf, but there is no doubt they kind of pulled back over the years. No testing, proof of performance etc. It's as if they've given up marketing the oil entirely other than the name/racing sponsors etc. Maybe they felt it was pointless. Who knows.....Mobil 1 Advanced Clean will likely flop like AP did. They've certainly kind of made a mess of their lineup.