Cars are one of the most valuable personal possessions in Singapore. Due to the high import duties and other taxes imposed on automobiles in the country, an average car can easily cost more than a S$100,000, while luxury cars can easily cost upwards of several hundred thousands of dollars. Given this, it's not surprising that some carowners feel compelled to only use premium petrol on their prized possessions. But, are high-octane grade fuel really worth the extra cost? Only Engine Capacity Above 2,000 CC Are Worth Fueling with Premium Petrol According to our calculation, only ultra-premium cars with engine capacity well in excess of 2,000 CC are worth the cost of using premium fuels. To come to this conclusion, we compared the extra cost of using premium fuel over for 10 years against the cost of engine repair or replacement, since the main benefit of using premium fuels ......