Grounding Cylinder Head Test Results (2024 CX-5 Turbo)

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2.5L gets up to 30 on highway and up to 28 combined. What did @CrazyHippie get before as a baseline? Claiming 29-30 after grounding isn't a step above the estimation. Unless that's your city mpg.
 
I was thinking it might be a good idea to take a look at some schematics to see where some grounds could be added for the modules, etc.
I don't have an auto transmission but there are other things that could probably use some upgrades.
Start with grounds on the engine cylinder head as outlined in this post.

Full disclosure, I grounded the throttle body on our turbo, zero amps through this ground. I don't recommend grounding the TB..
 
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