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      01-12-2013, 07:29 AM   #36
Second Lieutenant
jedpause's Avatar
United Kingdom

Drives: F10 520d M Sport Auto
Join Date: Jan 2012
Location: London

iTrader: (0)

Octane ratings 'different' US v UK

Further to my first response, and after reading vdubturbo's writeup... I studied a bit more.

Turns out regular and premium in UK have higher octane ratings than US. Seems regular here in UK is aligned with BMW minimum requirements, so our Premium (99 Octane) is much higher than needed, i.e. our regular is just fine and Dandy to keep the engine healthy....

i.e. US regular is below spec I believe, premium aligns it with BMW recommendations

That's why I don't have any inclination to buy premium in UK despite it being crazy expensive anyway.
Alpine White () F10 520d M Sport Auto - 8 speed Auto/paddles - 350M 18" Dunlop Rear/Michelin Front RFT's - Deleted Sports Suspension

Last edited by jedpause; 01-13-2013 at 05:56 AM.