the difference between regular and premium gas
1.Premium gas is pricier than regular gas. 2.Premium gas has higher octane ratings than regular gas. 3.Premium gas is ideal for the high-performance class and high-compression cars while regular gas is already good for most of the other regular to mid-class cars.4.Premium gas is believed by some to have more detergents (that serve to clean the engine) than regular gas.astly, some believe that premium gas has more detergent properties than regular gas. This means fewer residues left for premium gas users. However, it has also been discovered that most governments already regulate the required detergents in gasoline.
Premium gas has higher octane rating than regular. A VW Jetta should be run on premium as they're designed for it. Octane rating is the 'anti knock' rating of a motor.As the compression ratio is raised, so a motor tends to 'knock' or pre-ignite the cylinder charge.remium gas has higher octane rating than regular. A VW Jetta should be run on premium as they're designed for it. Octane rating is the 'anti knock' rating of a motor.