Where’s BWalker at when you need him. He’ll set you fellas straight on fuel and oil.
The best fuel is fresh fuel. Forget everything else. There’s so many variables. Just variations between different batches at the same station at different times, let alone differences from one station to the next can throw any “definitive results” out the window unless you’re doing a ton of testing with lab controlled operating conditions. If you’re gonna go full scientist on something, you have to do it properly if it’s to actually be a useful experiment.