I have noticed the exact same thing with my Type R. I am currently using Mobile 8000 but the exhause fumes are very strong especially in the morning. I didnt notice it much with Ultimate however i am still unsure of which fuels give me best performace vs milage. I am yet to try Vortex 98.
It's because your engine runs richer when it is warming up. And now it is winter, the cold engine means it runs rich for longer than in summer/spring/autumn.
Originally Posted by didz
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