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Revision to the fuel subsidy formula
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<blockquote data-quote="astroboy" data-source="post: 278194" data-attributes="member: 4527"><p>I found this article which I can understand better about Octane in fuel and what it actually means..</p><p></p><p>Source: <a href="http://auto.howstuffworks.com/question90.htm" target="_blank">http://auto.howstuffworks.com/question90.htm</a></p><p><span style="color: Sienna"></span></p><p><span style="color: Sienna"><u>The octane rating of gasoline tells you how much the fuel can be compressed before it spontaneously ignites. When gas ignites by compression rather than because of the spark from the spark plug, it causes knocking in the engine. Knocking can damage an engine</u>, so it is not something you want to have happening. Lower-octane gas (like "regular" 87-octane gasoline) can handle the least amount of compression before igniting.</span></p><p><span style="color: Sienna"></span></p><p><span style="color: Sienna"><u>The compression ratio of your engine determines the octane rating of the gas you must use in the car</u>. One way to increase the horsepower of an engine of a given displacement is to increase its compression ratio. So a "high-performance engine" has a higher compression ratio and requires higher-octane fuel. The advantage of a high compression ratio is that it gives your engine a higher horsepower rating for a given engine weight -- that is what makes the engine "high performance." The disadvantage is that the gasoline for your engine costs more. </span></p><p></p><p>Next question is what is limit of compression each RON level can tolerate?</p><p></p><p>I check my E90 fuel cap. Its just written there <strong>UNLEADED PETROL RON91, 95, 98, 100 or higher</strong> :stupid: Does that mean if RON98 not available, stick to RON95 ??! <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite8" alt=":D" title="Big Grin :D" loading="lazy" data-shortname=":D" /> And I'm running at Compression 10.5:1 compare to my Toyota at 10:1 which that one lagi best. The fuel cap just label "Unleaded Petrol" in <span style="color: Red"><strong>RED</strong></span>.. <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite8" alt=":D" title="Big Grin :D" loading="lazy" data-shortname=":D" /> <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite8" alt=":D" title="Big Grin :D" loading="lazy" data-shortname=":D" /></p></blockquote><p></p>
[QUOTE="astroboy, post: 278194, member: 4527"] I found this article which I can understand better about Octane in fuel and what it actually means.. Source: [url]http://auto.howstuffworks.com/question90.htm[/url] [COLOR="Sienna"] [U]The octane rating of gasoline tells you how much the fuel can be compressed before it spontaneously ignites. When gas ignites by compression rather than because of the spark from the spark plug, it causes knocking in the engine. Knocking can damage an engine[/U], so it is not something you want to have happening. Lower-octane gas (like "regular" 87-octane gasoline) can handle the least amount of compression before igniting. [U]The compression ratio of your engine determines the octane rating of the gas you must use in the car[/U]. One way to increase the horsepower of an engine of a given displacement is to increase its compression ratio. So a "high-performance engine" has a higher compression ratio and requires higher-octane fuel. The advantage of a high compression ratio is that it gives your engine a higher horsepower rating for a given engine weight -- that is what makes the engine "high performance." The disadvantage is that the gasoline for your engine costs more. [/COLOR] Next question is what is limit of compression each RON level can tolerate? I check my E90 fuel cap. Its just written there [B]UNLEADED PETROL RON91, 95, 98, 100 or higher[/B] :stupid: Does that mean if RON98 not available, stick to RON95 ??! :D And I'm running at Compression 10.5:1 compare to my Toyota at 10:1 which that one lagi best. The fuel cap just label "Unleaded Petrol" in [COLOR="Red"][B]RED[/B][/COLOR].. :D :D [/QUOTE]
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