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· Premium Member
1,928 Posts
Discussion Starter · #1 ·
I had a check engine light on VUDU and cleared it this morning and decided to switch from the 93 octane to the 91 octane tune mostly out of boredom. Damned if it didn't seem quicker light to light although 8 months ago it ran better with the 93 tune. I'm going to keep it on my car for a little while and measure the fuel mileage. One question to those with CMR tunes: does it matter which tune I data log it with?

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