have a 2002 volvo s40 with 204,000 kms
thinking of selling the car..been just using regular gas,,,,if i start using reemium gas now til i sell the car,,will this hurt the car,,,or just keep on using regualr gas...thanks

 

You won't be doing any harm to the engine. I think it actually performs better when you run premium

 

It won't hurt but it also won't help.