I've been driving since 1970, and had every kind of gas there is over the years (figuratively, not literally), and driven Fords, Chevy's, Dodges (383), Honda's, Toyotas, Mazdas, Volvos, Renaults, Jaguars, BMW's, BSA's, Yamahas, Moto Guzzi's, Harley's, and a few others, and 4 ALFA's: In all these years and all those vehicles, I never had an issue with fuel, and always used the appropriate octane. The only thing you do not want, is fuel sitting in a vehicle for long periods of time unused.
Other than that, I can say that I rarely go to the same gas station twice in a row, no matter what brand, so if there was a less than stellar formula underground that got into my tank, it would never be replaced with a second tank of that bad gas.
says, as long as you are getting your gas from a reputable company/station, it's all good, and if it is top tier, all the better, but I expect even if WaWa is not top tier, it probably has similar detergents, if not the same as Top Tier in most of it's fuel. They pump a lot of fuel...