No, but the base product would be if they are sharing sourcing. Ask yourself this "where is the Ultimate at my local BP coming from?" The BP refineries are in WA or Qld, so is it worthwhile them trucking it all that way? How many petrol tankers do you see on the road between Perth and Melbourne?
Yep, all refineries have different standards. They may aim for the same product but some refineries can never get there with their current equipement. That's why Shell is spending many millions upgrading Clyde and Geelong.
Nope, there are Australian standards but the tolerances are quite large ie; I believe I could sell 96 octane and claim it was 98. Check the disclaimers on the oil companies' web sites.
Never seen a patent on the chemical compostion of fuel, I don't think you could get one. The formulas and the chemicals used are all so well known, you could make your own if you wanted.
Maybe, but the refining quality and the source crude composition make far more of a difference than a very minor % of additives. rb20-calais said
Do you really think oil company additives did that?Just cause the sign out the front says "BP" doesn't mean BP made "everything" they sell there.