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What's our best fuel....
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<blockquote data-quote="turbology" data-source="post: 299707" data-attributes="member: 10223"><p>I don't have E39's 'ECU' schematic diagram. So I am not sure if it advance when you use RON97.</p><p>But it does have knock sensor to prevent knocking & retard timing when using RON92. You just get less performance. It won't create any problem if it stated RON91 can be use. </p><p></p><p>You might notice 3-10% less in KM per tank if use lower octane fuel.</p><p>With just 3sen ( or 2sen, how much is RON92? ) , it doesn't make sense to use lower octane gas in your BMW.</p><p></p><p>Only if the price different between 92 & 97 are more than 10% in price, I will stick with RON97 in BMW, like in US & Japan</p></blockquote><p></p>
[QUOTE="turbology, post: 299707, member: 10223"] I don't have E39's 'ECU' schematic diagram. So I am not sure if it advance when you use RON97. But it does have knock sensor to prevent knocking & retard timing when using RON92. You just get less performance. It won't create any problem if it stated RON91 can be use. You might notice 3-10% less in KM per tank if use lower octane fuel. With just 3sen ( or 2sen, how much is RON92? ) , it doesn't make sense to use lower octane gas in your BMW. Only if the price different between 92 & 97 are more than 10% in price, I will stick with RON97 in BMW, like in US & Japan [/QUOTE]
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