I would start with E30 or E40 as enrita said. Mixing in ethanol will provide more gains than methanol injection. Add meth and you get IAT cooling
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'18 F80 M3 Comp 6MT - Stock
'07 E92 335i 6MT- HP650, inlets/outlets, ER FMIC, VRSF CP, LPFP stg2, CSF rad, 'is Aux rad, ER OC, Ohlins, M control arms, eibach front sway bar.
'05 C55 AMG
SOLD - '22 Tesla M3P | '10 E92 335i M, 6MT | '07 E90 335i, PTF COBB E50, FBO, HFS4