My two cents....
Optimax Extreme is a SCAM!, 18-20c more a litre over regular unleaded at my local shell.
FACT: Ethanol doesn't attract the same excise and taxes as per crude based fuels, when 'blended' in the the refinery therefore should make the fuel cheaper. When servo owners making bout 1.9c per litre and ethanol technically being cheaper 2 produce, where does the 20c per litre go?? Hmmm.... Radio campaigns?
As for normal optimax having 10c premium over regular unleaded, its just an additive pack pumped into the tanker at the refinery as its being filled with regular unleaded. And what explanation was there for optimax 2 jump from 7-8c per litre over reg. to 10c per litre?? I don't know??? 6 months later, lookey, lookey, 95RON fuel sold at shell slotted exactly half way price wise btw reg. and Optimax... SCAAAM!!
Also... i remember the hype when this 100RON ethonal blend was released with some exceptions 2 what cars it is compatible with. I remember reading somewhere that Pre 96' Nissans (oz delivered) not liking ethonal. ie. Since my 32 may share some materials and manufacturing techniques with a oz delivered nissans, does this mean that it would be unwise 2 experiment with 100RON ethanol blended fuel in my car until the fuel lines harden, crack and burst with prolonged use?? Mayb im just being over cautious on my 15yo car..?
One more cent...
If ppl aren't noticing any change in their cars performance wise or pinging when using higher octane fuels or additives, would resetting your factory (if applicable)ECU help?? ie. letting it learn 2 run of what it was probably fueled up with in japan..
I've always gone with the motto: Always fill up with your 'niche' fuels at servos that have high turnover, ethanol (mayb all fuels) are great absorber of moisture which may collect in underground tanks over time, not sure as 2 how significant this may be in the real world but im pretty sure pre-flight checks on light aircraft involve checking all the tanks for condensation before flight, ref. TOP GEAR, Car vs Plane. great episode that one.. I'll shut up now..