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I always use a couple of bottles of fuel system cleaner suitable for DI engines when I first get the vehicle. After that, it gets a steady supply of 93 octane Top Tier fuel, usually from a name brand fuel source like Shell, which uses bespoke fuel additives. I never feel the need to reclean the injectors.
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'25 Mazda MX-5 Miata Club
'17 F15 X5 xDrive35i M-Sport
'18 B9 Audi A4 Premium Plus quattro S-tronic
Other sold cars of interest: E90 335i, S2000, E92 335xi, C6Z, F30 335i, 987.2 S, OG M2 LCI
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