Cheers guys
i will do that then from what you both have said. i will probably run a couple tanks every so often with the higher octane and then go with the lower.
I am planning to go on a long trip soon say if i have 1/2 tank left of the ron 95 and then top up with the ron 99 is this fine or is it worth just waiting till i completely fill up again to use the high octane?
Thanks
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Gone: F10 520d M Sport Space-Grey Metallic
Gone: G30 530i M Sport (B48) Bluestone Metallic
Currently Driving:BMW X3 (G01) xDrive20i M Sport 2020 Model
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