yes about right what i experience too.

Wow tiz tered still alive lol

https://en.wikipedia.org/wiki/List_of_gasoline_additives

There are a list of chemical relate to it, if you believe all petrol station formula is same then is your choice. The only thing i believe is the same across is the octane rating, but the rest chemical/additives inside some might add more or reduce some % to cater their own formula.

petronas because it is both the most economical and more powerful petrol for my cars

As a long term user of Caltex, im kinda struggle to bash them with this post, i like techron as it really works.

But too bad Caltex and Petron secretly add MMT (Methylcyclopentadienyl Manganese Tricarbonyl) AKA Octane booster. I hate this things which will coat on o2 sensor and cause false reading, the worst case clog catalytic converter.

Im using either bhp or petronas now for the peace of mind.
Shell has some additive like we turn on eco mode, too lean for my liking😮‍💨

Disclaimer, above statement was base on personal experience on ron95, does not comfirmed to all the stations.

How do you know they add mmt?

Sun

Powder like metal coating. Easily rub off by finger.
Or you can take my image ask chatgpt 😂

Meaning it will impact the spark plugs like your photo? All spark plug will kena like this? Or only certain cars?

Spark plug was not a big deal, it's powder like Manganese which is metal will clog catalytic converter and disturb reading of o2 sensor.

I also hope it wasn't MMT, but doing tons of research im very disappointed they added it secretly.

It was banned by most countries due to environment concern.

Only company with cheap fuel quality will use it for example making 91 to 93/95 fuel.