RON 95 was introduce to all petrol stations in Malaysia since 1st Sept 2009. Shell Replaced it's VPower Fuel with RON 95 meanwhile Petronas eliminated RON 97 from it's gas stations.
RON 95 is said to be more combustible compared to RON 97 so why it's being considered low quality fuel when it's just cheaper.
To begin to answer this question i need to first explain some basic principle & my understanding of engines. We gain power from how effective an explosion/combustion occurs in our engine. There's a number of ways to improve the power, one of which is the compression ratio.
Higher Compression = More Power
The higher the RON rating the higher the compression capability of the fuel before it explodes (Controlled explosion). This in turn produces more power/torque.
RON 95 will tend to explode with less compression compared to RON 97. What does it mean? Will our engine have less power if use RON 95?
We should understand that standard cars have standard compression ratios. Typically set by the manufacture which also specify which type of fuel we can use or RON rating. Most modern fuel injection engine is capable of identifying when knocking or earlier explosion before full compression occurs, so it's then capable to adjust to maximize the compression efficiency. What this means is our engines adjusts to the new fuel rating and still will produce good power.
My understanding is that RON 95 will produce better responds but with a slightly less power then RON 97 because of the slightly lower compression. But since the difference is not much, 2 digits after all the difference is not so noticeable.
Vios is capable of handling RON 95 well and so far with usage i don't sense any knocking issues. I also felt better responds from the engine. So to all Vios users out there don't be afraid of using RON 95.
The higher the RON rating the higher the compression capability of the fuel before it explodes (Controlled explosion). This in turn produces more power/torque.
RON 95 will tend to explode with less compression compared to RON 97. What does it mean? Will our engine have less power if use RON 95?
We should understand that standard cars have standard compression ratios. Typically set by the manufacture which also specify which type of fuel we can use or RON rating. Most modern fuel injection engine is capable of identifying when knocking or earlier explosion before full compression occurs, so it's then capable to adjust to maximize the compression efficiency. What this means is our engines adjusts to the new fuel rating and still will produce good power.
My understanding is that RON 95 will produce better responds but with a slightly less power then RON 97 because of the slightly lower compression. But since the difference is not much, 2 digits after all the difference is not so noticeable.
Vios is capable of handling RON 95 well and so far with usage i don't sense any knocking issues. I also felt better responds from the engine. So to all Vios users out there don't be afraid of using RON 95.
