Compression Ratio and Octane Chart

Assalamulaikum wrt wbt and hi!

I bought my 1^st car (hehe.. kunun2nya not the last one since I admired sgt Porsche Cayenna S..) on 29th January 2009. Since then, I called her Viva La Vida or Wow Salina Fantastic (the plate number started with WSFkn...hehehe). My younger brother, Muizuddin influenced me to buy La Vida with the simple statement, “Ateh kajila kenapa Viva lagi mahal dari Saga…?”.

Introducing.... My Viva La Vida. 1st date ni, 6 years back

La Vida dengan ibu, LOVE to INFINITY.. AL-FATIHAH.

For this entry, I do not want to comment about Viva by Perodua vs. Saga by Proton, I know each model has its own preferred user, but I am interested to share about the suitable petrol needed to run my Viva La Vida (the fuel technology...). In Malaysia, the available petrol fuel is only RON95 and RON97. RON stands for ‘Research Octane Number’, the number that indicates its ability to resist knocking as it burns in the combustion chamber of engine. The higher RON indicates the higher octane in petrol, thus higher ability to resist the knock. Than you may ask, why is it important with that knock thing (I am not referring to Knock Knock by Elizabeth Tan yg En. Syg sy suka tu tau..haaa). Engine knock shows that fuel burn unevenly and will cause damaging to cylinder and piston in a long term. For further reading.. 3 Causes of Engine Knock

Higher RON indicates more power for engine? It is not necessarily. Interesting info that I just found, variant of fuel consumption is actually depending on the vehicle’s specification. In order to decide the best RON for our vehicles, we need to know its compression ratio (CR) that should be provided by dealer when you want to buy a car. Higher CR require higher octane in petrol. For better understanding of CR, enjoy the clip downloaded from Youtube. Credit to r32gtr1994… Thanks!

Below are type of car and its CR;

La Vida                                        10:1

Iswara (Evo En. Syg)                        9.5:1

MyVi                                            10:1

Porshe Cayenna S (nak jugak...)       11.7:1

Porshe Cayenna S... M.E.L.T!
Source Google Image

Honda City                                8.8:1 or 10.1:1

Honda Civic (my previous obsession..)  11.7:1

Perfect! I always falling in love with rear design of the car. I always found it sexy. Hehe..
Source: Google Image

Refer to below chart;

CR	Octane
5:1	72
6:1	81
7:1	87
8:1	92
9:1	96
10:1	100
11:1	104
12:1	108

Wahhh.. Shows that my fuel consumption is perfect! La Vida with RON97, since 6 years ago, berpisah tiada. Hehe. Now, can you decide the best RON for your vehicle…?

Dr. Norzaidi.. This is my 1^st entry for MIS750 and another 4 entries to go. Aida Salina, BERUSAHA!!!

Many thanks!

P.S. Aida is listening to Vivaldi - Four Seasons