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The BMW Range
3 Series
E46
what petrol run best in ur e46 UDM?
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<blockquote data-quote="godflesh" data-source="post: 118693" data-attributes="member: 2276"><p>Paksu,</p><p></p><p>More octane does not mean more power. Octane is also not that easy to burn (relatively speaking) since it requires more activation energy. The power we experience with higher octane fuel is through controlled combustion (releases more energy per unit fuel). The absolute compression of the engine can be increased. More octane allows the compression of the engine to be increased without causing pre-ignition of the fuel. Complete combustion (not knocking) = more power. Thats why dragsters (high comp) etc use them without worrying about detonation in the cylinders under load.</p><p></p><p>More octane = allows higher compression design (absolute, not ratio) = more power = more $$$ <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite2" alt=";)" title="Wink ;)" loading="lazy" data-shortname=";)" /> </p><p></p><p>I think in our low compression engines (relatively speaking, again) all that is needed is clean unadulterated fuel.</p><p></p><p>Cheers.</p></blockquote><p></p>
[QUOTE="godflesh, post: 118693, member: 2276"] Paksu, More octane does not mean more power. Octane is also not that easy to burn (relatively speaking) since it requires more activation energy. The power we experience with higher octane fuel is through controlled combustion (releases more energy per unit fuel). The absolute compression of the engine can be increased. More octane allows the compression of the engine to be increased without causing pre-ignition of the fuel. Complete combustion (not knocking) = more power. Thats why dragsters (high comp) etc use them without worrying about detonation in the cylinders under load. More octane = allows higher compression design (absolute, not ratio) = more power = more $$$ ;) I think in our low compression engines (relatively speaking, again) all that is needed is clean unadulterated fuel. Cheers. [/QUOTE]
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what petrol run best in ur e46 UDM?
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