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標題: Husky/Mohawk fuel [打印本頁]

作者: 嘉嘉 時間: 2009-7-8 18:03 標題: Husky/Mohawk fuel

so how come the fuel they have has such high octane number and relatively cheaper compares to the rest

平o野真係有好？

作者: Derek128 時間: 2009-7-8 21:04

本帖最後由 Derek128 於 2009-7-8 22:08 編輯

北美用(RON + MON)/2

Husky/Mohawk o既油有10% 係酒精
會燒得快D

ethanol blend 個RON 數值會高D MON數值會低左
雖然用 (RON + MON)/2 Husky/Mohawk o既油係 90 octane起
但 enigne需求o既係 MON

即係如果你架車要ｏ既係87octance 你入Husky/Mohawk 都ok
因為Vancouver 各大油站　ｏ既貨源都係一樣
87octance 係最少additives 但如果你架車係要９１～９２　octance
佢d　92~94 octance 係咪”足料”就真係唔清楚

作者: 嘉嘉 時間: 2009-7-8 21:53

請問RON同MON係點解？

我架就唔係咩靚車，只係架Fit仔
咁即係入87都ok？

作者: Lik 時間: 2009-7-9 00:16

Pretty sure that Honda only recommends regular gas (87 octane) for the Fit, so if you don't do any performance driving, and you don't really push your car all that hard (stay in the high rev zone), regular gas (lowest octane level at the pump) is probably good enough.

The thing to watch out for is whether your engine is knocking. If you've been keeping up with regular maintenance, this shouldn't happen. But should it happen, it'll tend to do so on hotter days when you push the car harder. The ECU is supposed to retard timing to prevent knocking, but it can only do so much, and if something is wrong, the engine will still knock. When it does, you'll heard a knocking / pinging sound coming from the engine. It should be fairly obvious if it is really happening.

I used to be a fan of ethanol-blended gas, but increasingly there has been evidence that, under current production methods, it isn't nearly as good an alternative as it was once thought. So now I tend to shy away from it.

-Lik

作者: Derek128 時間: 2009-7-9 02:17

本帖最後由 Derek128 於 2009-7-9 03:35 編輯

請問RON同MON係點解？

我架就唔係咩靚車，只係架Fit仔
咁即係入87都ok？
嘉嘉發表於 2009-7-8 22:53

係不過我有幾個朋友渣Fit都入 min 89
有幾個仲係91~92

部車真係會好力d
不過冇一個入89,91,92 o既入 Husky/Mohawk

Research Octane Number (RON)

The most common type of octane rating worldwide is the Research Octane Number (RON). RON is determined by running the fuel in a test engine with a variable compression ratio under controlled conditions, and comparing the results with those for mixtures of iso-octane and n-heptane.

The only engine used to get these figures is a Waukesha engine used on a global scale

[edit] Motor Octane Number (MON)

There is another type of octane rating, called Motor Octane Number (MON), or the aviation lean octane rating, which is a better measure of how the fuel behaves when under load as it is done at 900rpm instead of the 600 rpm of the RON[2][3]. MON testing uses a similar test engine to that used in RON testing, but with a preheated fuel mixture, a higher engine speed, and variable ignition timing to further stress the fuel's knock resistance. Depending on the composition of the fuel, the MON of a modern gasoline will be about 8 to 10 points lower than the RON. Normally, fuel specifications require both a minimum RON and a minimum MON.[citation needed]

http://en.wikipedia.org/wiki/Octane_rating

作者: blue20ae 時間: 2009-7-12 19:09

In my old Subaru Forester, the Husky gas is more powerful and the car is more responsive. However the fuel efficiency is not as good.

作者: B2L2 時間: 2009-7-12 21:39

haha.. no free lunch.

作者: 嘉嘉 時間: 2009-7-12 23:20

thanks everyone for the replies~~~

yeah...I think I will just go back to to "regular" ones
maybe it's just 心理作用? I think this tank of Husky fuel is being used up slightly faster too....

lucky that the gas is a bit lowered these 2 days. Fueled up with shell today at 103.9 ^_^

作者: Lik 時間: 2009-7-12 23:38

While ethanol only contains roughly ~60% worth of the energy found in gasoline, bear in mind that ethanol-blended gas only contains 10% ethanol at most. That means with a 10% ethanol blend, the blended gas should only contain 5% less of energy. That 5% difference could easily be lost in the midst of variation in driving conditions la.

-Lik

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