| I have seen many people getting many different tunes based on different fuels. I am looking at doing the same for my Z later this summer, but am a little confused about fuels. So far, I plan a pump fuel (91) tune, along with a VP100 (R+M/2 of 100) and VP Motorsport 109 (R+M/2 of 105). I have seen some people getting C16 and Q16 tunes, but are these fuels not leaded? Isn't that bad of Oxygen Sensors & WBO2s?
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