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I started using it after I had an issue with fueling on my 2019 330i. I had been using mostly Exxon prem. and started running into an issue with stuttering, especially off throttle (ie when first applying throttle like coming off a stop or driving in a parking lot). Exxon is considered good fuel, but the fueling station I frequented always caused a fueling issue after filling up there. I switched to ethanol free and the problem went away after running the tank to empty and refiling it twice. Now, I primarily use ethanol free, but on occasion I'll use Shell prem.
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