FR on various RON grades of petrol

To those non believer of different RON grade is indeed different. Please hear me out.

With the recent big discount on petrol, there is a percieved savings on petrol so I pumped platinum grade for a bout a month without changing grades and brand - i pump Caltex Platinum.

The car seem to become more and more powerful (although not a sudden jump) over this period. For the first week, the engine sound seem to be more bassy and purr in a very uniform sound. Second pump onward, the trottle became more responsive and a sligh tap can surge the ride forward. This was verified by another dirver who test drove my ride during this period. But last week when I switch to 98 for a change, i was shocked that the ride has very obviously lose power!

It seems logical.

The ECU needs time to adjust, with or wothout VAFC. So the first tank with higher octane sees the ride with a nicer sound. the next tank of platinum makes the ECU completes the new learnings and so i felt the increase in power. Subsequent tanks made me accustom to the new responsiveness and so when eventually I changed back to RON 98, i felt the diff immediately.

So my conclusion is :
There's no point pumping higher grade "once in a while" if you do not want to continue to use it. the ECU will just keep adjusting itself with the varying A/F ratio.

There's nothing your VAFC can do as what goes in -what comes out. VAFC is not an alternative to better grade petrol.

Those that say they can't feel a diff is due to the effect of the petrol has not set in yet. It takes a second tank onwards to feel the difference.

Different RON grade DOES make a difference. and the difference in feel is obvious.

Platinum grade petrol can really enhance performance.

best grade enhances performance... gives me higher milage too... so no diff... i can save a few bucks on a lower grade petrol but i lose out on milage lo

Used to pump Caltex 95 all the way since car is new
But with the recent petrol discount war
I pumped Caltex 98 for a few tankful
And indeed, the car feel more responsive!!!

Now switching back to Caltex 95, the car like not so shiok liao leh

eeee78 wrote:

Used to pump Caltex 95 all the way since car is new
But with the recent petrol discount war
I pumped Caltex 98 for a few tankful
And indeed, the car feel more responsive!!!

Now switching back to Caltex 95, the car like not so shiok liao leh

bro, just bear the pain and try platinum for 3 tanks. I guarantee that you will be addicted! LAI!!!!!

Rookie wrote:

eeee78 wrote:

Used to pump Caltex 95 all the way since car is new
But with the recent petrol discount war
I pumped Caltex 98 for a few tankful
And indeed, the car feel more responsive!!!

Now switching back to Caltex 95, the car like not so shiok liao leh

bro, just bear the pain and try platinum for 3 tanks. I guarantee that you will be addicted! LAI!!!!!

eeee78 wrote:

Rookie wrote:

eeee78 wrote:

Used to pump Caltex 95 all the way since car is new
But with the recent petrol discount war
I pumped Caltex 98 for a few tankful
And indeed, the car feel more responsive!!!

Now switching back to Caltex 95, the car like not so shiok liao leh

bro, just bear the pain and try platinum for 3 tanks. I guarantee that you will be addicted! LAI!!!!!

Dun say I never say ok

Caltex gold is 98 octane. Platinium is... walla... 98 octane!!!

what's the difference??

There is no 'higher' octane rating. so it's not a higher 'grade' (I read octane) petrol.

so what makes it special? it's the additive package that is added to the petrol that makes the difference.

just so you know what you are gaining from...


btw, anyone wants to buy racing fuel? it's 130 octanes... you car will BURST with power... available in Singapore... about $40 per litre I think... so one tank of 40 litres... only $1,600 dollars... after that can change engine leow... but the performance... you won't believe it lor... prolly can tia a normal Rex on normal 98 octane fuel... prolly...


In japan, their normal pump "high octane" fuel is 106 octane...


hahaha... come try...

yes both may be 98, and the difference is in the additives. but if the additives work, why not. If they can make sugarcane work as a potent additive, I will add it into my ride too

You have to try it to feel it. it's just different. but you got to clear/flush the car's system completely so minimum 2, best is 3rd tsnk. After that stick to the petrol and u see how u can tear other Es and still maintain good fuel economy

haha... i believe you already no need to try...

no need to convince me lor...

mcdss wrote:

Caltex gold is 98 octane. Platinium is... walla... 98 octane!!!

what's the difference??

There is no 'higher' octane rating. so it's not a higher 'grade' (I read octane) petrol.

so what makes it special? it's the additive package that is added to the petrol that makes the difference.

just so you know what you are gaining from...


btw, anyone wants to buy racing fuel? it's 130 octanes... you car will BURST with power... available in Singapore... about $40 per litre I think... so one tank of 40 litres... only $1,600 dollars... after that can change engine leow... but the performance... you won't believe it lor... prolly can tia a normal Rex on normal 98 octane fuel... prolly...


In japan, their normal pump "high octane" fuel is 106 octane...


hahaha... come try...

bro, the higher octane level means the petrol prevent pre-ignite better than lower octane during extreme hot condition. and the engine need to be tuned to adapt to it.
so locally, trackies just mix some high octane fuel with normal one, to prevent detonation during track.

with high octane fuel, u can increase the compression ratio without pre-ignite, and also advance ignitiong timing without ignite. that's why high boost engines with more advance timing, they making better power with high oct fuel. this is also the reason why ppl always talking about turbo cars need to retard timing, or change to high comp piston, u need to retard timing else engine will ping. but the engine is not making power from burning high oct fuel.

dun believe? i still left 10L racing fuel at ah heng, use it for dyno, u get 5 more horse, i buy u big dinner, if not, buy me 20L racing fuel:D

Rookie wrote:

To those non believer of different RON grade is indeed different. Please hear me out.

With the recent big discount on petrol, there is a percieved savings on petrol so I pumped platinum grade for a bout a month without changing grades and brand - i pump Caltex Platinum.

The car seem to become more and more powerful (although not a sudden jump) over this period. For the first week, the engine sound seem to be more bassy and purr in a very uniform sound. Second pump onward, the trottle became more responsive and a sligh tap can surge the ride forward. This was verified by another dirver who test drove my ride during this period. But last week when I switch to 98 for a change, i was shocked that the ride has very obviously lose power!

It seems logical.

The ECU needs time to adjust, with or wothout VAFC. So the first tank with higher octane sees the ride with a nicer sound. the next tank of platinum makes the ECU completes the new learnings and so i felt the increase in power. Subsequent tanks made me accustom to the new responsiveness and so when eventually I changed back to RON 98, i felt the diff immediately.

So my conclusion is :
There's no point pumping higher grade "once in a while" if you do not want to continue to use it. the ECU will just keep adjusting itself with the varying A/F ratio.

There's nothing your VAFC can do as what goes in -what comes out. VAFC is not an alternative to better grade petrol.

Those that say they can't feel a diff is due to the effect of the petrol has not set in yet. It takes a second tank onwards to feel the difference.

Different RON grade DOES make a difference. and the difference in feel is obvious.

Platinum grade petrol can really enhance performance.

sometimes, thr RON value just for reference. but all the ppl around me are telling me caltex plat give better power. i want to try also, no $$

you are right, the ecu takes time to learn. the way ES civics ecu do is like:
during close loop, ECU will keep trying put timing advance as possible, but once the knock sensor detect detonation, the ecu will automatically retard timing 10-15 degrees. in another way, ur ecu are trying his best to provide u a more response drive, but the problem is u can never keep the best setting runing, it is change every seconds. this timing is not related to a/f ratio.
so when u using a higher oct fuel, ECU detected the detonation at higher advance degrees, so when it retard, 10-15 degrees, the average ignition timing is still higher than u runing on low oct fuel. u can fuel the power gain.

BUT you sure u felt it? ur butt is very sensitive;) roy or alvin might like it:twisted:

vic000 wrote:

Rookie wrote:

To those non believer of different RON grade is indeed different. Please hear me out.

With the recent big discount on petrol, there is a percieved savings on petrol so I pumped platinum grade for a bout a month without changing grades and brand - i pump Caltex Platinum.

The car seem to become more and more powerful (although not a sudden jump) over this period. For the first week, the engine sound seem to be more bassy and purr in a very uniform sound. Second pump onward, the trottle became more responsive and a sligh tap can surge the ride forward. This was verified by another dirver who test drove my ride during this period. But last week when I switch to 98 for a change, i was shocked that the ride has very obviously lose power!

It seems logical.

The ECU needs time to adjust, with or wothout VAFC. So the first tank with higher octane sees the ride with a nicer sound. the next tank of platinum makes the ECU completes the new learnings and so i felt the increase in power. Subsequent tanks made me accustom to the new responsiveness and so when eventually I changed back to RON 98, i felt the diff immediately.

So my conclusion is :
There's no point pumping higher grade "once in a while" if you do not want to continue to use it. the ECU will just keep adjusting itself with the varying A/F ratio.

There's nothing your VAFC can do as what goes in -what comes out. VAFC is not an alternative to better grade petrol.

Those that say they can't feel a diff is due to the effect of the petrol has not set in yet. It takes a second tank onwards to feel the difference.

Different RON grade DOES make a difference. and the difference in feel is obvious.

Platinum grade petrol can really enhance performance.

sometimes, thr RON value just for reference. but all the ppl around me are telling me caltex plat give better power. i want to try also, no $$

you are right, the ecu takes time to learn. the way ES civics ecu do is like:
during close loop, ECU will keep trying put timing advance as possible, but once the knock sensor detect detonation, the ecu will automatically retard timing 10-15 degrees. in another way, ur ecu are trying his best to provide u a more response drive, but the problem is u can never keep the best setting runing, it is change every seconds. this timing is not related to a/f ratio.
so when u using a higher oct fuel, ECU detected the detonation at higher advance degrees, so when it retard, 10-15 degrees, the average ignition timing is still higher than u runing on low oct fuel. u can fuel the power gain.

BUT you sure u felt it? ur butt is very sensitive;) roy or alvin might like it:twisted:

hahah bro, my not BBM

anyways, it's not the butt, it's the foot too. you step, it reacts better.

Rookie wrote:

vic000 wrote:

Rookie wrote:

To those non believer of different RON grade is indeed different. Please hear me out.

With the recent big discount on petrol, there is a percieved savings on petrol so I pumped platinum grade for a bout a month without changing grades and brand - i pump Caltex Platinum.

The car seem to become more and more powerful (although not a sudden jump) over this period. For the first week, the engine sound seem to be more bassy and purr in a very uniform sound. Second pump onward, the trottle became more responsive and a sligh tap can surge the ride forward. This was verified by another dirver who test drove my ride during this period. But last week when I switch to 98 for a change, i was shocked that the ride has very obviously lose power!

It seems logical.

The ECU needs time to adjust, with or wothout VAFC. So the first tank with higher octane sees the ride with a nicer sound. the next tank of platinum makes the ECU completes the new learnings and so i felt the increase in power. Subsequent tanks made me accustom to the new responsiveness and so when eventually I changed back to RON 98, i felt the diff immediately.

So my conclusion is :
There's no point pumping higher grade "once in a while" if you do not want to continue to use it. the ECU will just keep adjusting itself with the varying A/F ratio.

There's nothing your VAFC can do as what goes in -what comes out. VAFC is not an alternative to better grade petrol.

Those that say they can't feel a diff is due to the effect of the petrol has not set in yet. It takes a second tank onwards to feel the difference.

Different RON grade DOES make a difference. and the difference in feel is obvious.

Platinum grade petrol can really enhance performance.

sometimes, thr RON value just for reference. but all the ppl around me are telling me caltex plat give better power. i want to try also, no $$

you are right, the ecu takes time to learn. the way ES civics ecu do is like:
during close loop, ECU will keep trying put timing advance as possible, but once the knock sensor detect detonation, the ecu will automatically retard timing 10-15 degrees. in another way, ur ecu are trying his best to provide u a more response drive, but the problem is u can never keep the best setting runing, it is change every seconds. this timing is not related to a/f ratio.
so when u using a higher oct fuel, ECU detected the detonation at higher advance degrees, so when it retard, 10-15 degrees, the average ignition timing is still higher than u runing on low oct fuel. u can fuel the power gain.

BUT you sure u felt it? ur butt is very sensitive;) roy or alvin might like it:twisted:

hahah bro, my not BBM

anyways, it's not the butt, it's the foot too. you step, it reacts better.

waiting for ur sponsor for a tank:D

vic000 wrote:

[btw, anyone wants to buy racing fuel? it's 130 octanes... you car will BURST with power... available in Singapore... about $40 per litre I think... so one tank of 40 litres... only $1,600 dollars... after that can change engine leow... but the performance... you won't believe it lor... prolly can tia a normal Rex on normal 98 octane fuel... prolly...


In japan, their normal pump "high octane" fuel is 106 octane...


hahaha... come try...

bro, the higher octane level means the petrol prevent pre-ignite better than lower octane during extreme hot condition. and the engine need to be tuned to adapt to it.
so locally, trackies just mix some high octane fuel with normal one, to prevent detonation during track.

with high octane fuel, u can increase the compression ratio without pre-ignite, and also advance ignitiong timing without ignite. that's why high boost engines with more advance timing, they making better power with high oct fuel. this is also the reason why ppl always talking about turbo cars need to retard timing, or change to high comp piston, u need to retard timing else engine will ping. but the engine is not making power from burning high oct fuel.

dun believe? i still left 10L racing fuel at ah heng, use it for dyno, u get 5 more horse, i buy u big dinner, if not, buy me 20L racing fuel:D[/quote]



sssshhhh... bro... I know la... need to re-adjust the ignition timing one...
but if you did not... there will be interesting things happen lor...

and I not talking about dyno bhp gains...

it's butt-dyno power gains... the car will FEEL very powderful...

but it would be nice to change the timing to run on racing fuel... the way the car makes the power will be much different. Yes same top bHP... but how it gets there... that's more important, and when the torque pulls more also...


so yes, you picha lobang... cannot 'just add the fuel' must tune a bit also...


The Turtle - MCDS

Shell has a new VPower Racing Fuel out in Malaysia... anyone tried it?

seems nice...