I guess i'll just also add my 2c worth here on premium 98 unleaded fuels and my experiences with it.
Many years ago I did try a mix of BP Ultimate 98 unleaded in the 2 stroke mix, I didn't think it made any difference at all in how the engine ran it seemed the same as running it on standard 91 unleaded. The only thing I do remember though was that my eyes seem to sting a bit and possibly my nose was stinging a bit from the gases emitted from burning the 98 in my lawnmower. I straight away went back to regular 91 which doesn't seem to irritate the eyes and airways so much. Well this was my experience running it in the 2 stroke mix. Because of this I always just stick to regular 91, this is also what Victa used to recommend to run the 2 strokes on.
Another thing is don't really believe all the hype about how stable or how much this premium 98 petrol will help to prevent rust in the fuel system etc. It may be better if it's left in a tank for maybe just a few months and constantly refreshed with fresh fuel. I once had this premium 98 unleaded in an older car with a steel tank thinking that it would better protect the steel tank and other lines on the vehicle from rusting away. The result was it completely rusted out the inside of the steel petrol tank! Wherever this premium 98 fuel was touching inside the tank it was rusted right out! The fuel was sitting in the tank for a very long time though.
Well anyway that's just my 2c worth on this premium 98 unleaded petrol. In the end I think the only advantage of this fuel is if you actually need the higher octane of 98 to prevent pinging or knocking on an older engine or on a performance engine. It may have slightly better additives for cleaning the injectors or whatever on a newer vehicle. But as I mentioned don't leave it in any tank for a long time as it will rust it out. I learnt this the hard way.
Cheers!
Zip a dee doo dah, zip a dee ay, another trash picked Victa, hip hip Hooray!
