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      03-22-2018, 06:26 AM   #6
RamboUK
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Drives: BMW X3 (G01) xDrive20i M Sport
Join Date: Apr 2017
Location: NCL-UK

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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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