RON95 or RON97?

From last year onwards, my country introduced 2 types of petrol, namely RON95 and RON97. They are both subsidized petrol.

My dad told me that from next time onwards, our family will switch from RON95 to RON97. This is because he heard from his friend that RON97 is better than RON95 petrol. RON97 is more worthwhile even though its market price is 20 cents higher than RON95.

Do you notice that your car's engine is not as powerful as before and do you find that your car's engine is noisier? Do all these are due to "aged" engine? No, the answer is no! These are the consequences for consuming low-priced petrol. For example, my dad can go up to Ayer Itam reservoir by using gear 3 last time but now he has to use gear 2 with RON95 petrol.

Certainly, it is not economic feasible for those salesmen as they consume large amount of petrol in order to perform their duties. However, for a normal family like mine, we choose to use RON97.