But taking the average isn't always the case. It's a case of whether the chemicals in petrol play along together or not. For all you know mixing 95 with 97 might just give you slightly more than 95 octane but below 96.6.15 Can I mix different octane fuel grades?
Yes, however attempts to blend in your fuel tank should be carefully planned. You should not allow the tank to become empty, and then add 50% of lower octane, followed by 50% of higher octane. The fuels may not completely mix immediately, especially if there is a density difference. You may get a slug of low octane that causes severe knock. You should refill when your tank is half full. In general the octane response will be linear for most hydrocarbon and oxygenated fuels eg 50:50 of 87 and 91 will give 89.
Well, my engine has low compression ratio, 9.4:1. I prefer to advance the ignition timing a bit to increase low end torque and engine response. However, when using RON95 there is some minor engine knocking at 2-3k RPM and major one at above 5500 RPM. I believe using RON97 will help to solve the problem, but the problem is it's expensive... So I came up with the idea of mixing them.LOL.. Theoretically it should be. But why? Just use RON 97 if yours is high performance engine. Even with RON 97 in our country, I don't think it is enough for high performance engine. A lot of jap high revving engines are tuned with RON 98 or RON 99. So even RON 97 is not enough to unleash the full power. Let alone RON 96. Fk the gomen.
It is tempted to say with RON97, you may able to maximize your stroke length to give better power to your engine. BUT sadly, it does not....Of course with RON97, you may able to maximize your stroke length to give better power to your engine.
Well...i would say fun things do come with a price.
Agree..as many modern cars are equipped with variable timing to control the ignition using a knocking sensor (eg. nissan sentra). When the ECU senses knocking, it will changes its ignition sequence and timing to suit the explosion temperature of the fuel. Lower RON explodes at lower temperature. The reason why I mentioned that RON97 gives you more power is when you tune ur car to run only on the higher RON. But if your car is tuned to run on RON97 and its already the max stroke u can go, using RON999999 also no useIf you car is running without knocking with 95, if you feed 97, 102 or 110 or 130, your car will not perform any better
Bumping up your compression ratio by that much, you definitely need to use RON97 + some tuning or even aftermarket ECU I think. You need to ask the sifus...sorry to be slight off topic.. huhu.. since someone brought this up.. dear sifus or gurus, ur wisdom is much appreciated..
i managed to increase my engine's CR ~10.5:1 with stock internals from my original CR, which is 9.5:1. my foreman advise me to use 97, BUT, is it too much of a risk to tune my engine using 95 with that compression? i dun think 10.5 is that high still. :( any infos/suggestions/experiences?
thanks in advance..
often time , I got saga, myvi coming in telling me 95 is no good to their car, but i will refill the tank again and prove them wrong... Q: why they hear knocking when they pump RON95
Ofter found issue is the petrol station they use. Their petrol is contaminated. 2 out of 10 petrol station in Malaysia got into severe gasoline contaminated issue, Cause no 1: flood Cause no 2: manmade
often time you will see petrol station close down for weeks or days, because the reservoir need to be empty and to clean it, to seal up the cracks.
by all means... when you pump the fuel, think do you really need it?
Bumping up your compression ratio by that much, you definitely need to use RON97 + some tuning or even aftermarket ECU I think. You need to ask the sifus...
Personal opinion :my Swift Sport stock CR is 11.1:0 but still runs ok with RON 95. there's a slight ping once awhile but nothing serious. as many Swift Sport owners also use RON 95. so i don't see any problem with it.
If not mistaken, swift sport's spec requires RON98...cant even get in M'siamy Swift Sport stock CR is 11.1:0 but still runs ok with RON 95. there's a slight ping once awhile but nothing serious. as many Swift Sport owners also use RON 95. so i don't see any problem with it.