@@TorqueAndTwisted The test is verified with the original Toyota oil, the gasoline saving is great and with Mobil 1 it is not the same. I did my test with a hybrid Toyota.
@TorqueAndTwisted There's a video by Lake Speed Jr. On RU-vid that shows that prefilling the oil filter actually prevents wear. He actually shows what it does to an engine. So I will continue to prefill my filter