Originally Posted by jcastle
Would you know if there are any benefits or downsides of using the 98 or 99 (RON) octane gasoline we normally use where I come from with the JB tune?
BMW recommend 95RON fuel but all official BMW performance data comes from using 98RON. Been using 98RON for as long as Shell had it available. (Years ago it was called Optimax & currently V-Power) Extra kms driven compared to lower RON fuel.
Cleaner burning as far as manufacturers' claims go.
My dealer started me off with a tankful of 95RON in my F30. I then put 98RON after using the first tank. I could feel a distinct performance improvement from the 98RON. Will ALWAYS use 98RON in my F30.
328i M-Sport, Estoril Blue, Carbon XP 35 Tint, front heated seats, black Dakota, Sports Suspension, Anthracite Headliner, HUD, Pro Nav, Sunroof, hk 600w, Bi-Xenon, 19" 403M wheels, Reversing Camera, DAB+, Xenon, BT Ext Connect. JB4 on Map 2 with Catless DP produces awesome performance in Sport.