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The BMW Range
3 Series
F30, F34
F30 August 2013 - RON95 or RON97?
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<blockquote data-quote="seancorr" data-source="post: 721486" data-attributes="member: 42054"><p>My apology on not elaborating further on this matter.</p><p></p><p>This not what the head of service said to me about this matter. There is a case whereby a car stalled due to carbon build up inside the engine and it was found that the owner pumped RON95 all the while and the case got blown out of control with various parties involved as the owner insisted that a BMW should run fine on RON95 as stated in the car fuel cap but reality is our fuel quality isn't as good as what we think it is..(I personally had 2 family cars stalled on the highway due to poor fuel quality as the fuel filter was clogged up after using the lowest fuel octane for a good amount of years)</p><p></p><p>Hence the reason why I am advised by the dealer to pump RON97 for a few rounds upon reaching an empty tank to flush out any RON95 residue and to and make sure the engine control unit adapts to the new fuel quality and this is what I noticed while doing this (running RON95 for 2-3 months and using RON97 to do the cleaning).</p><p></p><p>The total mileage on the computer will increase to approx. 20km extra the MOMENT I pump a higher octane...be it RON97 or the Shell V-Power Racing which is said to be even cleaner and better. But when I switch back to RON95, the system will show a lower average total mileage I will get with the lower fuel quality. How it knows I switched fuel quality is really astonishing though. </p><p></p><p>Of course when I switch back to RON95 after pumping RON97 2-3 times, the first fill up will suffer in FC as the computer needs to adapt back to the fuel quality but it will improve in the 2nd and future fill ups of RON95. For clarity sake, I've been doing this over the past few months and taking note of the difference the above is what I've observed.</p><p></p><p>Ideally I would have gone RON97 all the time but since my tax money is being used to subsidize RON95....heck must well I make full use of it until the day our fuel is no longer subsidized.</p></blockquote><p></p>
[QUOTE="seancorr, post: 721486, member: 42054"] My apology on not elaborating further on this matter. This not what the head of service said to me about this matter. There is a case whereby a car stalled due to carbon build up inside the engine and it was found that the owner pumped RON95 all the while and the case got blown out of control with various parties involved as the owner insisted that a BMW should run fine on RON95 as stated in the car fuel cap but reality is our fuel quality isn't as good as what we think it is..(I personally had 2 family cars stalled on the highway due to poor fuel quality as the fuel filter was clogged up after using the lowest fuel octane for a good amount of years) Hence the reason why I am advised by the dealer to pump RON97 for a few rounds upon reaching an empty tank to flush out any RON95 residue and to and make sure the engine control unit adapts to the new fuel quality and this is what I noticed while doing this (running RON95 for 2-3 months and using RON97 to do the cleaning). The total mileage on the computer will increase to approx. 20km extra the MOMENT I pump a higher octane...be it RON97 or the Shell V-Power Racing which is said to be even cleaner and better. But when I switch back to RON95, the system will show a lower average total mileage I will get with the lower fuel quality. How it knows I switched fuel quality is really astonishing though. Of course when I switch back to RON95 after pumping RON97 2-3 times, the first fill up will suffer in FC as the computer needs to adapt back to the fuel quality but it will improve in the 2nd and future fill ups of RON95. For clarity sake, I've been doing this over the past few months and taking note of the difference the above is what I've observed. Ideally I would have gone RON97 all the time but since my tax money is being used to subsidize RON95....heck must well I make full use of it until the day our fuel is no longer subsidized. [/QUOTE]
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F30 August 2013 - RON95 or RON97?
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