What? The ECU ("knock sensor") isn't concerned about what kind of gas you put in your vehicle. This is a sophisticated computer that constantly monitors the engine and adjust certain computerized/electronic actions within the engine. The computer is ON and ACTING 100% of the time the vehicle is running. Whether it adusts a lot or a little doesn't have any effect on it.
It's just like the CPU of any computer. You can run it 24 hours a day under 100% load or 1 hour a day under 5% load. The CPU is not going to go out or be damaged in any way - it's not a mechanical device that wears.
Jees, we use petrol every day, we drive every day yet so many "enthusiasts" haven't the first clue on how modern engines work. We aren't dealing with a '68 Corvette here, people.
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Originally Posted by DINANM3
Put premium gas in your Bimmers its not worth it. The knock sensor is there to save your ass if you cant get any good gas in a pinch. Its not meant to be used day in day out for 100,000 miles.
Plus if you need the extra 5 bucks from a fill up that bad. then you really cant afford a Bimmer anyway.
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