Quote:
Originally Posted by Jayf30
What do you think of the ECU tune that mission tuning has just put out? Don't know whether to do that or JB4. What I like about their tune is that their numbers have been achieved with 91 octane because they're based in California just like me. I don't know exactly what kind of gains I'd be looking at with 91 octane with JB4.
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Research Dinan.
https://www.dinancars.com/dinanbmw/?make=BMW
I have to run 96 octane to stay in the map I like with the JB4.