This issue has been discussed many times. Let me share some points for you guys.

Alot of that so called 'difference' that ppl experience between Ron 95 fuel and Ron 97 is actually psychological. You may see some minor difference but no where worth the price ure paying for Ron 97 currently. The slightly better mileage (if any) will be easily obscured by the much higher cost of the Ron 97 fuel. Please be reminded that Shell Ron 97 is not Shell V Power Racing.

Using a higher octane fuel will not make much difference to internal carbon formation. Its actually a waste to use high octane fuel when your car only needs a lower grade. You wont get much difference in mileage or engine performance. The truth is that every grade of fuel has cleaning agents. Too much cleaning agents, some say, can actually damage your car.

Octane is a measure of how much the fuel can be compressed before it spontaneously ignites. Only engines with higher compression ratios take advantage of higher octane gas.

http://www.ftc.gov/bcp/edu/pubs/consumer/autos/aut12.shtm

Another interesting article:

http://www.fraudguides.com/tips/june2.asp

So guys, please stop using Ron97 fuel. Its a complete waste. If u really insist on using, then limit yourself to 1 full tank every 6 months just for a 'clean-up'. Again, i dont think its neccessary

Btw, i did tests before between the Ron 95 and V Power Racing (not V Power 97) and there was a slight increase in acceleration. But with V POwer 97, there was no such noticeble difference. But V Power Racing is RM 3.30 right?

The car manufacturer would be the best advisor in this case. We can assume the compression increases but again it will be the car manufacturer who will specify a suitable fuel that maximises the performance benefit by using a higher octane fuel. If the car manufacturer has only specified Ron95 as the required fuel, then using Ron 97 is a waste. Like i said earlier, any slight difference (if any) will be insignificant compared to the much higher cost of Ron 97 fuel. Is it worth paying RM66 extra per full tank for this 'slight difference'? Thats RM 1,584 extra per year assuming you fill 2 tanks per month. So instead of spending RM 2,736 per annum, ure gonna spend RM4,320.

The problem with most ppl is that they think the performance increase (if any) will be significant and most of the time its just quantified by word of mouth rather than any hard facts

Although the octane reading may be same (Ron 95) but the additives from each manufacturer could be different thus creating such scenarios. Some say Shell 95 creates such problems while others claim Petronas also has similar issues. But there are others who say both these fuels are ok. So i guess it differs. Ive tested Caltex, Mobil and Shell and ive not noticed any difference. I only noticed a difference when using Shell V Power Racing but not V Power 97.

Plus we also gotta take the age of the car into consideration.

But in terms of power and acceleration, there would only be very marginal differences (if any) using Ron97 for a car designed for Ron 95. Either way, i dont think its worth the extra RM 1.00 per litre ure paying.

Either way, i think the new BHP Ron 95 Infinity Advance 2X would be a better choice at a cheaper price. Im just trying my first full tank this week.

This post has been edited by cybermaster98: Oct 23 2012, 11:01 AM

Firstly, are you refering to high performance cars? If not, which car in particular are you refering to? The topic of discussion i believe is normal day to day passenger cars. Secondly, is the car designed for Ron 95 or Ron 97?

How do you know a car specified as Ron 93 compatible will perform better using Ron 97? We're not saying that cars cannot operate on higher octane fuels. The question here is:

1) Is there an actual significant increase in power and performance using normal Ron 97 fuel in a car specified for Ron 95?
2) Does this difference (if any) warrant the extra price we're paying for Ron 97 fuel long term?

What do you think?

This post has been edited by cybermaster98: Oct 23 2012, 01:15 PM

Do you think the new BHP Ron 95 Euro 3 fuel will be better than the current Euro 2 fuel offered by other competitors?

Ive been using Shell 95 for some time now. But recently changed to the new BHP RON 95 fuel. After 2 full tanks, i notice that my car engine sounds louder when idling. Not sure why. Anybody else tried the new BHP Euro 3 fuel?