@assna_maz That's what knife fighters do. There's a bill before the house of parliament fancies to change the nation's motto to "I don't think you have, mate".
@gotrice2024 Octane slows the burn rate. If your engine doesn't have a high enough dynamic compression ratio to take advantage of it, you are wasting your money. The only way to know for more vehicles would be to data log it and see if there are changes in timing under identical conditions.