High Octane Fuel
- Thread starter TripleM
- Start date
quiksilver
Core Group Members
TripleM said:
why is this so lei? :screwedu:
the article is generally right, but assumes conditions allow for knockless operation. in singapore heat and/or under high loads, this may not be true.
for relatively stock NA BMWs..
read knock sensor or ignition timing activity via OBD. if there is activity, start increasing octane slowly, reset ECU, and drive it the same way in the same weather, also checking OBD. knock sensor activity and ignition timing retard should both have reduced.
increase octane till no knock is seen, ignition is not retarded, or ignition goes to highest amount of advance. The octane level you arrive at it the right octane for the conditions and state of tune of the engine.
for relatively stock NA BMWs..
read knock sensor or ignition timing activity via OBD. if there is activity, start increasing octane slowly, reset ECU, and drive it the same way in the same weather, also checking OBD. knock sensor activity and ignition timing retard should both have reduced.
increase octane till no knock is seen, ignition is not retarded, or ignition goes to highest amount of advance. The octane level you arrive at it the right octane for the conditions and state of tune of the engine.
Racebred
Core Group Members
i think the substance is benzene. carcinogenic.
what shaun say is right. unless we plug in the pda to check knock values and ignition retard values, we also dunno if it's useful or not.
but i'm pretty sure if we pump in 95ron, there'll be an increase in knock prevention from the engine. no good. one day should your knock sensor suddenly fail, your engine will slowly ping itself to piang heaven.
also, too high octane also no use for normal engines and may even cause loss of power, as the activation energy may not be enough to break up the bigger macromolecule bond for complete combustion.
what shaun say is right. unless we plug in the pda to check knock values and ignition retard values, we also dunno if it's useful or not.
but i'm pretty sure if we pump in 95ron, there'll be an increase in knock prevention from the engine. no good. one day should your knock sensor suddenly fail, your engine will slowly ping itself to piang heaven.
also, too high octane also no use for normal engines and may even cause loss of power, as the activation energy may not be enough to break up the bigger macromolecule bond for complete combustion.
rodders said:Kiasu drivers probably!! :screwedu:SL2 said:TripleM said:98
Then why do the petrol stations try to sell the V-Powers and other premium petrol? I mean, if even a premium car like BMW doesn't really need it, who will the target market be?
Luckily my company petrol card can pump 98 only!! Otherwise will be called kiasu. Rodney, don't tell me you only pump 95 or 98 hor 8)
I won't tell you then..........*actually I only pump 98. Not driving a Yam Tree....So I don't need such as powderful petrol*SL2 said:rodders said:Kiasu drivers probably!! :screwedu:SL2 said:TripleM said:98
Then why do the petrol stations try to sell the V-Powers and other premium petrol? I mean, if even a premium car like BMW doesn't really need it, who will the target market be?
Luckily my company petrol card can pump 98 only!! Otherwise will be called kiasu. Rodney, don't tell me you only pump 95 or 98 hor 8)
SL2 said:TripleM said:98
Then why do the petrol stations try to sell the V-Powers and other premium petrol? I mean, if even a premium car like BMW doesn't really need it, who will the target market be?
Target market isnt really an issue here, I am sure there are many BMW or Merc owners out there use premium fuel. Mobil/Esso's premium fuel is 8000synergy which is much cheaper than V-power but considered premium for that brand name and guess what, it's so popular.
I hv pumped 95 before (not that I wanted to try but that was during track day in Sepang so no choice) and man, it's different from my regular 98!
TripleM said:SL2 said:TripleM said:98
Then why do the petrol stations try to sell the V-Powers and other premium petrol? I mean, if even a premium car like BMW doesn't really need it, who will the target market be?
Target market isnt really an issue here, I am sure there are many BMW or Merc owners out there use premium fuel. Mobil/Esso's premium fuel is 8000synergy which is much cheaper than V-power but considered premium for that brand name and guess what, it's so popular.
I hv pumped 95 before (not that I wanted to try but that was during track day in Sepang so no choice) and man, it's different from my regular 98!
Was using Synergy 8000 before I was handed the Shell Fleet Card. Must say that I find Mobil petrol tend to last alot longer than Shell petrol. Not sure how true it is..just my own opinion.
