Can Porsche Boxster take 95RON?

[Crazecow]

This is a hilarious reply.

 

talk until like V-power is a kind of lubricant.

 

Go Shell's website and read about their Friction Modification Technology for Vpower before you comment.........

[Crazecow]

why not just use ethanol?

 

You will need to pour in alot.... and car has to be retuned for Ethanol.

 

Most common octance booster chemical is methylcylcopentadienyl manganese tricarbonyl or MMT in short. You can find that most octance booster products contain this chemical.

[Crazecow]

why not just use ethanol?

 

You will need to pour in alot.... and car has to be retuned for Ethanol.

 

Most common octance booster chemical is methylcylcopentadienyl manganese tricarbonyl or MMT in short. You can find that most octance booster products contain this chemical.

[Pisces69]

even if the car manual says recommended 95ron, u can go for lower ron rating, but at your own risk...one possible tell-tale sign that the lower ron is not working well is when u get knocking...

 

Many cars come wh a 'plug' that u can use to adjust/retard e timing so u can safely use a lower ron which yr car is supposed to run best on.

 

This is in case yr country dont hv e higher ron. But it wil affect e performance abit but still better than using a lower ron n having engine damage in e long run.

[Pisces69]

The Boxster spec is 93 Octane.

 

So the owner is wasting money using 95.

 

But maybe Porsche owner so money no issues to him.

 

SG dont hv 93[ony got 92, 95 n 98] so e next higher is 95 so its e best option.

[Ladykillerz]

\

 

Dont know anything about octane with regards to compression dont gei kiang and give wrong info thanks.

 

yes, i very gei kiang one.

and i am very certain that a Porsche Boxster is able to take in RON95 or even RON92.

do you know what is the minimum ROM for Porsche Boxster with a compression ratio of 12.5:1? hehehe. ;-)

you must be a scholar, please teach everyone.

[Pisces69]

Not necessary. It all depends on whether the ECU is programmed to take advantage of higher RON fuel.

 

Actually, all the cars on the road can take advantage of RON98 fuel. Its just the that the stock ECU is usually not programmed to take advantage of it. Why? Thats because its not the real itention of the design. When manufacturers program the ECU, they take in many accounts like where the car is sold, the type of fuel that may be available in the car and reliability and of course development cost. IT takes alot of testing in order to determine suitable maps for the car and time is money.

 

In reality, it is impossible for the car to detect the RON of the petrol you pump. What is does is only to detect knock. If it does not detect knock, it can auto advance ignition timing and run leaner till either detects knock or reachs the max value of its map. Mainstream cars are usually not programmed for RON98 fuel (perhaps just 95 or even 92). Thus when you pump 92/95, the car is able to advance ignition to the max and run at near optimum A/F ratio. But when you pump 98, the car cannot advance timing further and adjust A/F ratio because its at the max for its programmed settings. Hence, no improvements.

 

However, if there are countries where there are lower RON petrol like 85 or 89, then pumping 89 and 92 will make a difference.

 

This is also the reason why ECU flashing or piggyback or aftermarket ECU can allow more power when you pump 98. Thats because they bypass the stock settings and put more aggressive settings for the car so it can take advantage of 98 petrol.

 

I fully agree wh what u say in theory but funny thing is my previous corona n now optra recommend 95 but i get better fc n smoother engine/more power when i pump 97.

 

I think e ECU can advance e timing slightly above e recommended settings if a slightly higher ron is used.

 

[Pisces69]

My china car say need 93 minimum lei. I dun dare to pump 92. lol..

 

For China car is very different. If u pump in 92, once u come near e redline, e whole engine wil explode.

 

Come to think about it, even if u pump 98, e engine wil explode once u rev to near redline.

 

Just dont rev near redline n u sud b ok.

[Pisces69]

Actually i'm also one of those idiot that swear by V power.. Never tried any other brands cos the shell station is very close to my house.. 98 use to be fine but after tuning my ride, no more kick.

 

I'm the kind of idiot who would actually carry 10 to 15 bottle of elf octane booster before every trip north. My buddy with an evo is worse. He brings up a whole carton of octane booster. Like mama shop.

[/quote]

 

 

Thats half e fun of being a petrol-head.

[20G]

Not true!!

 

when I was in Melbourne studying, Subaru agent bring in only 400 WRX STI to Australia and these STI are 2 doors coupe.

 

few years later Subaru recall all STI and change a new slightly detune engine.

Reasons??? those STI are meant for 100RON petrol same Japan spec STI and Australia best only 98RON thus engine show sign of problem.URL link to see the unique 2 door coupe classic design. people than studying in Australia during that time will know

http://www.mazdarotary.net/azzamwrx.htm

 

First, why would Subaru CHANGED the entire engine to a detuned one when only a tune is required to bring the power down? who told u? Glenn Tan from Bodoh Image?

 

Second, wat do u mean 'those' STis only can run on 100Ron? During the late 90's, i had a fren driving this exact model, in SINGAPORE. u mean at that time there's 100Ron petrol in SINGAPORE?

 

 

 

 

[20G]

I differ for performance car u can really feel the rush or more pulling power with higher RON, thus I always pump Caltex Platinum or v-power

 

so, wat performance car u driving now? Kia Koup?

[Cerano]

You will need to pour in alot.... and car has to be retuned for Ethanol.

 

Most common octance booster chemical is methylcylcopentadienyl manganese tricarbonyl or MMT in short. You can find that most octance booster products contain this chemical.

 

for E10/E25 petrol dont need to retune wad. and E10 is 10% ethanol so say a full tank of 66L only 6.6L of ethanol required.

 

Ethanol has octane 129 so you can calculate the overall RON of your petrol

 

Say you tune for 98 when you have 97 RON petrol in malaysia you will require very very little ethanol

[VellfireS]

I agree dude.. :)

[D3badge]

First, why would Subaru CHANGED the entire engine to a detuned one when only a tune is required to bring the power down? who told u? Glenn Tan from Bodoh Image?

 

Second, wat do u mean 'those' STis only can run on 100Ron? During the late 90's, i had a fren driving this exact model, in SINGAPORE. u mean at that time there's 100Ron petrol in SINGAPORE?

 

that was reported in theage.com.au melbourne newspaper. go email Subaru head office in Melbourne, Subaru change to a detune engine cause report engine damage. BTW Australia got these 400 2 door coupe STI with Japan Spec.

 

Singapore WRX STI doesnt mean we get the same spec as Japan STI, and unlikely ur friend was driving an STI in that model MY99 more likely a WRX as Australia was the 1st to recieve STI outside Japan, and singapore dun come in 2 door coupe

 

 

Edited November 13, 2010 by D3badge

[ER-3682]

for E10/E25 petrol dont need to retune wad. and E10 is 10% ethanol so say a full tank of 66L only 6.6L of ethanol required.

 

Ethanol has octane 129 so you can calculate the overall RON of your petrol

 

Say you tune for 98 when you have 97 RON petrol in malaysia you will require very very little ethanol

Not all cars can used Ethanol,can melt some plastic/rubber parts in the engine,also Ethanol got water inside,very bad for engines.

[Crazecow]

Not all cars can used Ethanol,can melt some plastic/rubber parts in the engine,also Ethanol got water inside,very bad for engines.

 

The water inside ethanol (depending on concentration), doesn't do anything to the engine. You don't have to worry about engine damage. Of course, we are talking about spraying thru inejctors, not pouring ehtanol into the engine.

 

However, you are right about rubber/plastic parts. If they are not designed to handle ethanol, they can corrde and steel pipes may rust.

[Crazecow]

I fully agree wh what u say in theory but funny thing is my previous corona n now optra recommend 95 but i get better fc n smoother engine/more power when i pump 97.

 

I think e ECU can advance e timing slightly above e recommended settings if a slightly higher ron is used.

 

Yes, you are right. most ECU can advance timing and adjust A/F ratio, but up to a certain point. When the ECU doesn't detect any knock, it will usually auto advance the timing. Then when then is knock, it will reduce and stay there.

 

Another factor is the additives added into the petrol. If you cehck Shell and Esso website, their 98 and Vpower petrol in SG contains additional friction reducing additive (works just like upper cylinder lube) and other additves to boost power. All these additives will make the engine slightly smother

 

Thats also why I add minute amts of 2T oil into my petrol. Its to serve as upper cylinder lube.

[Crazecow]

yes, i very gei kiang one.

and i am very certain that a Porsche Boxster is able to take in RON95 or even RON92.

do you know what is the minimum ROM for Porsche Boxster with a compression ratio of 12.5:1? hehehe. ;-)

you must be a scholar, please teach everyone.

 

He probably didn't read that direct injection engines can use lower RON petrol despite the higher compression.