溫哥華老友記討論區 - Powered by Discuz! Board

標題: chevron gasoline weaker now [打印本頁]

作者: 毅字 時間: 2009-12-3 17:40 標題: chevron gasoline weaker now

提示: 作者被禁止或刪除內容自動屏蔽

作者: shutterbug 時間: 2009-12-3 19:37

Just follow what everybody else is doing. So pay more and get 94 haha

作者: Catpiano 時間: 2009-12-3 20:13

I think chevron has 94??

作者: Quest 時間: 2009-12-3 20:19

I gotta 10.3:1 engine car that runs of 87 octane and I don't really have to deal with higher octane.

So? Your point is?

作者: pkphilip 時間: 2009-12-3 21:20

Charge the same price yet octane level dropped by 1 :-)

Philip

作者: 毅字 時間: 2009-12-3 21:24

提示: 作者被禁止或刪除內容自動屏蔽

作者: 毅字 時間: 2009-12-3 21:25

提示: 作者被禁止或刪除內容自動屏蔽

作者: Derek128 時間: 2009-12-4 00:37

use 94 then

作者: Monkii 時間: 2009-12-4 01:12

Wake up please. Octane number has nothing to do with gasoline quality.

作者: pkphilip 時間: 2009-12-4 01:29

I fill up in US for years... don't care/don't know how much gas are in Canada now.. my car takes 87, but I always go 89. Sorry.

Philip

作者: Catpiano 時間: 2009-12-4 08:20

Wake up please. Octane number has nothing to do with gasoline quality.
Monkii 發表於 2009-12-4 02:12

Ha?

So, you mean oct87 = oct 94??

Elaborate...

作者: shutterbug 時間: 2009-12-4 09:00

Wake up please. Octane number has nothing to do with gasoline quality.
Monkii 發表於 2009-12-4 02:12

Please define what you meant by 'gas quality'. We're talking about engine knocking and compression ratio here.

My car has 11:1 compression ratio, running 91/92, no ping. I wonder how it would do if I put in 89 in the winter, haven't tried yet.

作者: tiffiant 時間: 2009-12-4 09:09

serious?
http://van.bc.gastips.com/region?id=eastside

作者: 毅字 時間: 2009-12-4 09:11

提示: 作者被禁止或刪除內容自動屏蔽

作者: 毅字 時間: 2009-12-4 09:45

提示: 作者被禁止或刪除內容自動屏蔽

作者: 毅字 時間: 2009-12-4 09:49

提示: 作者被禁止或刪除內容自動屏蔽

作者: Catpiano 時間: 2009-12-4 10:30

aiya .. 91 92 94 .. no big deal la..

I put 94, but if they sold out, I put 92 .. no problem wor ..

作者: 毅字 時間: 2009-12-4 10:39

提示: 作者被禁止或刪除內容自動屏蔽

作者: shutterbug 時間: 2009-12-4 12:32

seperate question, is "Esso gas station" selling 87, 89, 91 ?
毅字發表於 2009-12-4 10:49

anyone who owns a car can probably answer this question...

作者: myversa 時間: 2009-12-4 12:37

seperate question, is "Esso gas station" selling 87, 89, 91 ?
毅字發表於 2009-12-4 10:49

http://www.esso.ca/Canada-Englis ... F_FuelsProducts.asp

according to this, yes.

作者: myversa 時間: 2009-12-4 12:39

can anyone confirm that "super save gas station" sells 87, 89, 92 ?
毅字發表於 2009-12-4 10:45

[flash]http://www.supersave.ca/images/flash/gas/2.swf[/flash]

作者: Derek128 時間: 2009-12-4 14:01

本帖最後由 Derek128 於 2009-12-4 15:07 編輯

don't be so on-9, learn to save on gas
毅字發表於 2009-12-4 11:39

if u think u know the diff between 91 & 92, but using 94 is wasting money

sell ur car, get one can take 87
or even walk, bike, or take the bus...................save on gas

作者: 毅字 時間: 2009-12-4 15:51

提示: 作者被禁止或刪除內容自動屏蔽

作者: 毅字 時間: 2009-12-4 15:52

提示: 作者被禁止或刪除內容自動屏蔽

作者: chobit 時間: 2009-12-4 17:01

I wish Seattle has 94 octane, and makes a big diff. for my car, since the computer is actually protune with both it's timing and boost...! But obviously.. my car is protune to US Gas.... much lower octane... =(

作者: 毅字 時間: 2009-12-4 18:15

提示: 作者被禁止或刪除內容自動屏蔽

作者: 毅字 時間: 2009-12-4 18:19

提示: 作者被禁止或刪除內容自動屏蔽

作者: Catpiano 時間: 2009-12-5 10:38

maybe because ESSO sounds like A S S HOLE, i've never purchase any fuel there

wat a fk name
毅字發表於 2009-12-4 19:19

Ha ha .. then you probably won't marry a girl with name "Alice" or "Agnes" etc ... especially with last name "Ho"

作者: news 時間: 2009-12-6 21:48

問野都問得咁能寸

作者: Catpiano 時間: 2009-12-6 22:19

I still dont really get it ..

Sigh .. too old la.. once over 30 .. can't think too fast ... L O L

作者: sheep 時間: 2009-12-6 22:25

I still dont really get it ..

Sigh .. too old la.. once over 30 .. can't think too fast ... L O L
Catpiano 發表於 2009-12-6 23:19

Then answer him 3 days later.

作者: Monkii 時間: 2009-12-9 01:18

Please define what you meant by 'gas quality'. We're talking about engine knocking and compression ratio here.

My car has 11:1 compression ratio, running 91/92, no ping. I wonder how it would do i ...
shutterbug 發表於 2009-12-4 10:00

May be just my mis-interpretation of OP's meaning of "WEAK"
But technically, 91 and 92 have no difference or effect when your car asks for 91.
OP makes it sounds like...買菜搭札蔥, 宜家唔送蔥棵菜就唔好

in my opinion, quality of the gasoline as in "ability to keep the engine running clean" is by far more important than octane level.

作者: ricrick 時間: 2009-12-9 03:08

1.What is octane?
   A gasoline's octane number is a measure of its ability to resist knocking as it burns in the combustion chamber of an engine. A spark from the spark plug starts normal combustion. The flame travels across the combustion chamber rapidly and smoothly until all the fuel is consumed. Abnormal combustion occurs when part of the fuel/air mixture ignites spontaneously and burns very rapidly, causing the pressure to rise suddenly. This results in a metallic knocking or pinging sound. A gasoline's ability to resist knocking is called its anti-knock quality. The octane number of a gasoline indicates the anti-knock quality of the fuel. A gasoline's octane number is determined by comparing its resistance to knocking to the performance of reference fuels in a test engine.

2. What octane does my vehicle need?
   To determine your vehicle's octane requirement, look at the manufacturer's recommendation in your owner's manual. Most auto manufacturers recommend 87 octane gasoline, as measured by the (R + M) / 2 method on a test engine under defined operating conditions. If the vehicle knocks on the recommended grade, a higher octane grade should be selected. Some foreign vehicle manuals recommend a Research Octane Number (RON) instead of the more common octane rating that appears on most gasoline pumps. As a rule, the recommended octane rating can be determined by subtracting four (4) from the recommended RON number. A vehicle that calls for "91 RON" should use 87 octane gasoline (as measured by the (R + M) / 2 method). Using a higher grade than is required will not usually increase performance. However, if the vehicle is equipped with knock sensors, as many late model vehicles are, a higher octane grade may enhance performance.

3.Why does my vehicle require a higher octane gasoline than is recommended in my owner's manual?
   There are two reasons. First, the engine may be at the upper end of the octane requirement range for the particular model. It may, therefore, knock during periods of heavy engine load. The octane requirement for each engine in vehicles of the same make is different because of variations in manufacturing tolerances. Industry testing has shown that this difference can range between two and five octane numbers. While you will not hear knock, the spark timing will be retarded, resulting in loss of power and performance.

   The second reason for using a higher-octane gasoline than recommended is because the equilibrium level of combustion chamber deposits is higher than average resulting in a higher than average octane requirement for the engine. Industry testing shows that the octane requirement increase (over the initial 20-50,000 kilometres) can be as much as nine octane numbers. This means that a vehicle that was originally designed for 82 octane fuel may eventually require 91 octane fuel to perform satisfactorily.

作者: 毅字 時間: 2009-12-9 08:36

提示: 作者被禁止或刪除內容自動屏蔽

作者: 毅字 時間: 2009-12-9 08:45

提示: 作者被禁止或刪除內容自動屏蔽

作者: 毅字 時間: 2009-12-9 08:54

提示: 作者被禁止或刪除內容自動屏蔽

作者: 毅字 時間: 2009-12-9 08:56

提示: 作者被禁止或刪除內容自動屏蔽

作者: habitrailspace 時間: 2009-12-9 09:46

Higher octane ratings correlate to higher activation energies. Activation energy is the amount of energy necessary to start a chemical reaction. Since higher octane fuels have higher activation energies, it is less likely that a given compression will cause autoignition.

It might seem odd that fuels with higher octane ratings are used in more powerful engines, since such fuels explode less easily. However, an uncontrolled explosion is not desired in an internal combustion engine. The fuel must be fired at a precise time. An explosion too early will cause the resulting forces to try to turn the crankshaft in the reverse direction. This will not cause the engine to rotate in the reverse direction because of the kinetic energy in the rotating assemblies and the flywheel, but will strain the crankshaft. This strain is the source of the characteristic 'ping' noise heard during detonation. This reduces power output, because much of the energy is absorbed as strain and heat in parts of the engine, rather than being converted to torque at the crankshaft.

A fuel with a higher octane rating can be run at a higher compression ratio without causing detonation. Compression is directly related to power, so engines that require higher octane usually deliver more motive power. Engine power is a function of the fuel, as well as the engine design, and is related to octane rating of the fuel. Power is limited by the maximum amount of fuel-air mixture that can be forced into the combustion chamber. When the throttle is partially open, 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 when the throttle is opened fully and the manifold pressure increases to atmospheric pressure, or higher in the case of supercharged or turbocharged engines.

Many high-performance engines are designed to operate with a high maximum compression, and thus demand high-octane premium gasoline. A common misconception is that power output or fuel mileage can be improved by burning higher octane fuel than a particular engine was designed for. The power output of an engine depends in part on the energy density of its fuel, but similar fuels with different octane ratings have similar density. Since switching to a higher octane fuel does not add any more hydrocarbon content or oxygen, the engine cannot produce more power.

However, burning fuel with a lower octane rating than required by the engine often reduces power output and efficiency one way or another. If the engine begins to detonate (knock), that reduces power and efficiency for the reasons stated above. Many modern car engines feature a knock sensor – a small piezoelectric microphone which detects knock, and then sends a signal to the engine control unit to retard the ignition timing. Retarding the ignition timing reduces the tendency to detonate, but also reduces power output and fuel efficiency.

作者: Lik 時間: 2009-12-9 10:31

ur opinion makes u a totally 笨7. wat u said "quality of the gasoline as in "ability to keep the engine running clean" is by far more important than octane level" is like very ON LUN 9.
毅字發表於 2009-12-9 08:36

My foul-mouthed little ricer kid,

If you're so smart and so knowledgeable about cars, why don't I see you answering automotive posts as clearly and as thoroughly as some of our resident licensed mechanic or veteran racers / car enthusiasts? Instead of bench racing and bs-ing, why don't you contribute something useful to the forum for a change? or at least come out to the track and see how you'll get your a$$ whopped?

-Lik

作者: 毅字 時間: 2009-12-9 10:38

提示: 作者被禁止或刪除內容自動屏蔽

作者: shutterbug 時間: 2009-12-9 12:48

本帖最後由 shutterbug 於 2009-12-9 13:50 編輯

Higher octane ratings correlate to higher activation energies. Activation energy is the amount of energy necessary to start a chemical reaction. Since higher octane fuels have higher activation energi ...
habitrailspace 發表於 2009-12-9 10:46

another copy & paste from wiki

Actually higher octane fuel COULD have slightly less energy content, so if you put higher octane than what you car actually NEED may result in worse performance.

作者: Catpiano 時間: 2009-12-9 12:53

Um .. most cars recomend 91-93 nowadays anyway ....

作者: shutterbug 時間: 2009-12-9 13:36

Um .. most cars recomend 91-93 nowadays anyway ....
Catpiano 發表於 2009-12-9 13:53

probably true for most (actually all) of YOUR cars...LOL

作者: Catpiano 時間: 2009-12-9 13:38

probably true for most (actually all) of YOUR cars...LOL
shutterbug 發表於 2009-12-9 14:36

Ding lay la ...

作者: Monkii 時間: 2009-12-9 15:16

ur opinion makes u a totally 笨7. wat u said "quality of the gasoline as in "ability to keep the engine running clean" is by far more important than octane level" is like very ON LUN 9.
毅字發表於 2009-12-9 09:36

最撚Q叻係你喇, 入94架車僥飛添, 得把口正廢柴

作者: Monkii 時間: 2009-12-9 15:26

你條9係上下MOVE既。如果你插緊嘅asshole入面既熱壓太高﹐未LUN出火就已經自爆﹐條9明明要向上MOVE﹐但太早自爆反而造成阻力。即係POTENTIAL TO DAMANGE INTERNAL PARTS。 ...
毅字發表於 2009-12-9 09:45

收下火啦, 同志

作者: 毅字 時間: 2009-12-9 15:27

提示: 作者被禁止或刪除內容自動屏蔽

作者: ACC-HE 時間: 2009-12-9 15:31

毅字, drink a beer and cool off la~ I treat you lark. Why so Lo Hay?

作者: 毅字 時間: 2009-12-9 15:37

提示: 作者被禁止或刪除內容自動屏蔽

作者: 毅字 時間: 2009-12-9 15:41

提示: 作者被禁止或刪除內容自動屏蔽

作者: chobit 時間: 2009-12-9 16:22

Back to the topic. Anywhere still have 92 in Rmd or Van? My car is tune to run at least 92, and I would hate to feed it with anything less. Lately.. I am planning to feed it with some 101 octane at shell station near-by..!

作者: shutterbug 時間: 2009-12-9 17:00

Shell has 101 Octane???? is it pump octane or RON?

作者: B2L2 時間: 2009-12-9 17:22

At Seattle, right? Always heard that there is one Shell at Seattle selling 101 unlead gas. They have even high octane leaded gas, like 110.

作者: news 時間: 2009-12-10 12:00

saw 92 at the chevron on grandview highway near boundary besides walmart

作者: 毅字 時間: 2009-12-10 16:23

提示: 作者被禁止或刪除內容自動屏蔽

作者: fibbi 時間: 2009-12-10 17:23

Also wanna mentioned that less and less gas station offers 94...
The one close to my house changed 94 to DIESEL!

作者: Catpiano 時間: 2009-12-10 19:27

Also wanna mentioned that less and less gas station offers 94...
The one close to my house changed 94 to DIESEL!
fibbi 發表於 2009-12-10 18:23

The other way around here .. more and more 94 .. and seem like people prefer to line up and wait for the 94 pump ...

作者: chobit 時間: 2009-12-11 00:29

It's not on a reg. pump, but if you ask the guy inside, they have access is a smaller pump which give 101 real us spec octane. Some people buy them for mixing with the 92 for higher Octane rating (eg. 95/96)

As far as I know, the only gas station in the north that serve 101 is Trasher's Corner Shell at Millcreek they sell Unleaded 101.

I live 5 mins away from there, so I probably will drop by to find out more info soon.

Shell has 101 Octane???? is it pump octane or RON?
shutterbug 發表於 2009-12-9 17:00

作者: Monkii 時間: 2009-12-11 00:49

幼稚仔﹐改POST有LUN用﹖你估而家仲係細路仔玩賓州呀﹖你越改POST越LUN話比人聽你既低劣同愚昧. 根本你就唔7知個DIFFERENCE。無知
毅字發表於 2009-12-9 16:37

慳啲啦死gay佬, 剩係識得踩人, 我僥唔僥駛撚同你講, 多鳩餘
我改post係俾其他老友笑吓, 唔撚get唔撚識笑你咪柄埋一邊玩賓州囉, 我哋唔會笑你架

作者: 毅字 時間: 2009-12-11 01:05

提示: 作者被禁止或刪除內容自動屏蔽

作者: news 時間: 2009-12-11 15:23

maybe it is the station owner's choice? coz the station i mentioned is just opened within the last few weeks

作者: 毅字 時間: 2009-12-11 17:17

提示: 作者被禁止或刪除內容自動屏蔽

作者: Monkii 時間: 2009-12-11 18:29

老實講~大家唔同層次既,
你有幾多﹖大家有目共睹,
唔好再斗纏﹐我對潑婦真係完全無好感,

excuse me. ...
毅字發表於 2009-12-11 02:05

你同我都一樣覺得入94係多餘, 我都唔知你爲乜Q串我
my point is some companies' gasoline can keep the engine running more cleanly with less deposit in the long term, in return there's less needs for the car requiring higher octane after years of driving.
知你層次高, 睇唔明普通人寫嘅嘢, 我會原諒你

Anyone interested in Husky/Mohawk $2 off $25 gasoline purchase can PM me =P
Their lowest octane gas is 90, which is same price as 87 at other stations. (as far as I know at the husky on garden city/bridgeport)

作者: 毅字 時間: 2009-12-11 18:52

提示: 作者被禁止或刪除內容自動屏蔽

作者: Lik 時間: 2009-12-11 18:56

Anyone interested in Husky/Mohawk $2 off $25 gasoline purchase can PM me =P
Their lowest octane gas is 90, which is same price as 87 at other stations. (as far as I know at the husky on garden city/bridgeport)
Monkii 發表於 2009-12-11 18:29

Husky / Mohawk gas are ethanol-blends (up to 10%), and some cars may not like that la.

-Lik

作者: 毅字 時間: 2009-12-11 19:00

提示: 作者被禁止或刪除內容自動屏蔽

作者: Monkii 時間: 2009-12-11 19:12

得喇得喇~以後唔好再煩我
唔駛再寫GUM多﹐我唔會睇
毅字發表於 2009-12-11 19:52

真好笑, 你自己屎忽痕走去插人仲話人煩Q你

作者: shutterbug 時間: 2009-12-12 00:55

Husky / Mohawk gas are ethanol-blends (up to 10%), and some cars may not like that la.

-Lik
Lik 發表於 2009-12-11 19:56

ethanol blended gas has less energy content than gasoline my friend (not much about 3%???), don't just look at octane number...

作者: 羽山 時間: 2009-12-14 16:29

how long is chevron change 92 to 91 ???????????

作者: Lik 時間: 2009-12-14 17:40

ethanol blended gas has less energy content than gasoline my friend (not much about 3%???), don't just look at octane number...
shutterbug 發表於 2009-12-12 00:55

True, but in the E10 gas we have here, the difference in mileage should hardly be visible.

Interestingly, my old VW 1.8T seems like the Mohawk/Husky E10 gas quite a bit...

-Lik

作者: chobit 時間: 2009-12-14 22:54

I know this is unrelated to the original topic..! But, FYI, I checked 101 @ the Chevron I talked about. It's pretty expensive @ $7.xxUS a GAL.

作者: shutterbug 時間: 2009-12-14 23:57

I know this is unrelated to the original topic..! But, FYI, I checked 101 @ the Chevron I talked about. It's pretty expensive @ $7.xxUS a GAL.
chobit 發表於 2009-12-14 23:54

I thought you said it was Shell who has 101?

7/gallon is a rip off la, just get a bottle of octane booster.

作者: Catpiano 時間: 2009-12-15 10:19

$7/Gal .. is ~ $1.5x?L

Not that bad in Canada .. but expensive in US la..

歡迎光臨溫哥華老友記討論區 (http://loyaukee.com/forum/)