I have been using United 98 (same as Peak 98 btw) for about 6-8 months (MY06 STI, exhaust, ECUTek etc))...have also used it in competition (MC State Sprint Series) and it has been fine. Have had the tune checked by MMS recently and all is good so I have no hesitation in recommending it especially since it's only 10c about std unleaded instead of BP's 13c.... plus one can get 4c off with IGA discount...win, win....
United 98 is re-badged Mobil Synergy (2000?) 98 octane which has been on sale on the east coast for a number of years...and yes, it comes out of Singapore.
Oh, yeah, I don't really worry about fuel consumption, but if it goes further then bonus.
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