The aim to eliminate the pollution and harmful effects of Lead caused by leaded gasoline led to the birth of unleaded gasoline. Leaded gasoline was used years ago to prevent the knocking-effect in the car’s engine, which is addressed by the presence of Lead in the gas. At present, unleaded gasoline and several car engine innovations have made leaded gasoline to obsoletion.
Presently, there are different grades of gasoline that could be used in your car: unleaded, super unleaded and premium unleaded. You just have to check which type is advised in your car owner’s manual. These types differ in the octane rating where the higher octane rating depicts better performance and more cost. A higher octane rating makes your engine have faster acceleration and more power plus a less violent explosion in your cylinder. You can use the grade specified in your manual or something higher than that, but not lower. There are also some types which are advertised to have other additives that could keep the engine cleaner and this, of course, cost more.
An important thing to note is to fill your tank in gas stations where several vehicles are filled up and gas supply is easy replenished. In this way, you’ll be sure you’ll get fresh gas and no “unwanted stock” will clog your tank.