我刚才多伦多那边开回来,路上发现了一件事。我从美国回来的,那边的气温在+5左右,高速120~125km/h,最省油的一缸油是~7。5L/100km,到了regina,-25,加了27L的91号油,沿#1开回来(#16好像大雪暴)120km/h,还有一段开到了195km/h试车( ),气温平均-7,结果那一缸油达到了7L/100km!加油的时候我都不相信。半缸的91号可以有这么大的区别吗?5 B) A& z; e* c3 \/ J
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我想问问有没有人给87号油的车加91号油,性能有什么提高?省油吗?4 C; K# M- o3 Y2 ]. ^' a
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我今天加了一缸91号的,想看看市内回不回也省油。不过我发现加速好像快一点(也有可能是心里作用)。不知道在哪看到的说是加91号可以boost extra 3-7hp because extra octane.
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91號的汽油用在87標號的車裏是浪費油。( J3 X; v3 ^ ? U
87號的汽車用在91標號的車裏是弄壞車。" c1 w6 y' h$ C: r+ l5 m$ k
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air+ diesel=more power, but it won't work on a car that is not designed for it.9 T3 t- r3 q: n) j
Higher compression ratio gives more power, but it needs higher octane to prevent pre-ignition. 6 v* k6 X/ @0 ^5 ?9 K7 mThere is no absolutely advantage of putting higher octane fuel into a low compression enginee but it won't hurt it.
It might seem odd that fuels with higher octane ratings burn less easily, yet are popularly thought of as more powerful. The misunderstanding is caused by confusing the ability of the fuel to resist compression detonation (pre-ignition = engine knock) as opposed to the ability of the fuel to burn (combustion). * \9 V: R* w* s- u1 e8 v0 T
$ a" C( C/ [9 E) v" V0 l! yHowever, premium grades of petrol often contain more energy per litre due to the composition of the fuel as well as increased octane.A simple explanation is that carbon bonds contain more energy than hydrogen bonds. Hence a fuel with a greater number of carbon bonds will carry more energy regardless of the octane rating. A premium motor fuel will often be formulated to have both higher octane as well as more energy.) |4 I2 Y$ t) F; [6 J9 I
---fromWikipedia, the free encyclopedia$ h- U6 p3 {0 w( C8 Y& A3 b7 L
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我也汗一个 + B. r& d: u' j8 u% [