Question: what is the difference between premium unleaded 95 and 98?
Answer: The main difference between 95 petrol and 98 petrol is 'knock' resistance. ... 95 petrol works as well, but if your engine is powerful, it will use higher pressures that 95 petrol may not be able to withstand. If you want to be on the safe side, 98 petrol will offer your engine better protection.