Hi, I was wondering if anyone has the rr racing ecu tune? I want to learn more about it from your personal experiences before I decide whether or not to purchase.

 

Tons of reviews of the RR tune on different models just search for the IS model you are looking for and tune in the search box.

Here's a link to get you started.
https://www.clublexus.com/forums/cl-vendor-products-for-3is/845276-rr-racing-ecu-tuning-and-supercharger-development.html

 

I have it on my IS350. Top end power is definitely more noticeable.They are pretty much the only reliable tuner available for the Lexus platform.

 

hows the mpg after the tune?

 

Depends on your driving style...Highway i get around 26-27 driving normally 70-75 MPH. City is around 19-21 MPG driving normally.