白金無鉛和黃金無鉛有甚麼分別？

Hope you can read and understand the following. This gives a very detailed explanation of 白金無鉛( highest octane) 和黃金無鉛 (high in octane):

Using a fuel with a higher octane (白金無鉛)lets an engine run at a higher compression without having problems with knock. Actual compression in the combustion chamber is determined by the compression ratio as well as the amount of air restriction in the intake manifold (manifold vacuum) as well as the barometric pressure, which is a function of elevation and weather conditions.

Compression is directly related to power, so engines that require higher octane usually deliver more power. Engine power is a function of the fuel as well as the engine design and is related to octane ratings of the fuel... power is limited by the maximum amount of fuel-air mixture that can be forced into the combustion chamber. At partial load, only a small fraction of the total available power is produced because the manifold is operating at pressures far below atmospheric. In this case, the octane requirement is far lower than what is available. It is only when the throttle is opened fully and the manifold pressure increases to atmospheric (or higher in the case of supercharged or turbocharged engines) that the full octane requirement is achieved.

Many high-performance engines are designed to operate with a high maximum compression and thus need a high quality (high energy) fuel usually associated with high octane numbers and thus demand high-octane premium gasoline.

The power output of an engine depends on the energy content of its fuel, and this bears no simple relationship to the octane rating. A common myth amongst petrol consumers is that adding a higher octane fuel to a vehicle's engine will increase its performance and/or lessen its fuel consumption; this is mostly false—engines perform best when using fuel with the octane rating they were designed for and any increase in performance by using a fuel with a different octane rating is minimal.

Using high octane fuel for an engine makes a difference when the engine is producing its maximum power. This will occur when the intake manifold has no air restriction and is running at minimum vacuum. Depending on the engine design, this particular circumstance can be anywhere along the RPM range, but is usually easy to pin-point if you can examine a print-out of the power-output (torque values) of an engine. On a typical high-rev'ving motorcycle engine, for example, the maximum power occurs at a point where the movements of the intake and exhaust valves are timed in such a way to maximize the compression loading of the cylinder; although the cylinder is already rising at the time the intake valve closes, the forward speed of the charge coming into the cylinder is high enough to continue to load the air-fuel mixture in.

我都係覺得冇分別
可能我部係舊車啦

本人也比較過兩者的分別.

理論上，白金無鉛的成份比黃金無鉛含更多的高燃燒化學物，　有助於 complete combustion　（完全燃燒），　使燃燒油的力量輸出比較大同好！！　並且因為完全燃燒，　所以留存在車子的剩餘物也自然會少　（清潔ｄ），　而車的壽命也自然提高！

可是, 本人比較過後，　發現白金無鉛除了貴d之外, 車的性能, 力量等等都沒有明顯的分別!!　（只是個人意見）．　我想是因為車本身的問題！新式的車和有改裝的車，　基本上，車子燃燒汽油的效率效能已經很高很好了！　所以白金無鉛的一點點幫助並不明顯！！　可能，　（本人未試驗過！），　白金無鉛用在舊車上，　功效會明顯一點！

希望這答案可以幫到你！！

From Fairlady Z33.