Which is why I dont get too hung up on variety of redex, just getting it as cheap as possible. A lot of folk say it's basically the same additives they add to premium fuels, could well be right on that, I know on my rebel 125 it ran far worse on Trsco fuel, than on Texaco stuff, on that the difference could be felt within about 1/4 mile of the filling station and was about 10 or 15mph off the top speed and a lot of acceleration. The Texaco stations been around years and is a small village garage so liklyhood should be they'd be the old tanks and stale fuel risk, on paper, Tesco store was pretty well new site at the time so should be clean tanks, fresh fuel. Whether its additives left out or ethanol added there was a marked difference.
When it comes to the various releasing fluids or oils, seems a very murky world, I buy cheapest as a rule, used gallons of duck oil wd40, 151 super maintenance oil etc. The aerosol is handy to get stuff into the right spot and not coat the car in more old oil, but for serious workshop jobs with properly rusted up stuff old engine oil or heat seem as effective as any fancy fluids. That and time, in fact wd40 and the thinner oils dry out where used engine oil keeps soaking in. Add a brass hammer and time most things go before the hot spanner is applied. A lot depends on the job. Really old machines using cast iron and imperial threads seem to revive and un seize better than 80s metric stuff. I revived a 100 year old lathe seized solid since the 50's in a day using 151 releasing oil and 2 stroke oil without a single dammaged thread before chistmas, yet a 100 year old hay rake refused to free off its axle so stubbornly I had to drill / cut the whole axle assembly out of the wheel. Gas axe seemed unable to shift it with heat or cutting. None of the releasing oils even got close to wetting the joint, even applied hot, soaked for a week etc. When I drifted the split stub of much abused, drilled and cut axle out of the hub the joint was dry as could be despite all the penetrating fluids thrown over it.