First, look at your Car's manual. What is the recommended RON to be used? If stated anything below RON 95, then using RON 95 will be good enough. If border line at RON95, then maybe better to use RON97.
Another will be, when using RON 95 do you get pinging/knocking sound when engine is under stress. Meaning like driving uphill, or when you have reach higher revs in 4k RPM region. If yes, then RON 95 is not right for your car.
Another alternative is to test at least 3 tank full of RON 97 and see if there is better power. If there is then have to use RON 97.
For me, my wife's NA Sonata is recommended with RON 91 only, so am using RON 95. Tried RON 97 no difference.
For my turbo, I have tried RON 95 too.
On my 3rd tank the engine refuse to rev above 4.5k RPM and started spluttering. So expensive RON 97 have to be used.....
There is another way you can try, is to mix RON 95 and RON 97 fuel. You save a little and maybe get a little better power....
It is all about what RON you car is tuned to......
The same goes to my Cefiro 3.0l, finally got a letter from TCM stating that the 3.0V6 must only use RON97...
Last time petrol per month is about RM1,200 and this is only around KL area.
QUOTE
Morning Bro vr2turbo,
Mine is just a 2.0L NA engine. I cruise on the highway at legal speed only once in a while tekan. But, the manager said if use RON97 better pick up and performance for my ride. What's your findings on this RON thingy ? Cheers.
I have tried both in my Myvi, and the Camry at home. No issue with RON97 and RON95. Only difference is that the R97 is smoother and better in power. But thats pretty minimal and not worth paying for. RM1.90 vs RM2.50... I am too peasant to pay RM0.60 per liter for my petrol.
When I switched over from my Cefiro to the Myvi, I saved 100%, and the Camry 20% from switching to R95.