Why’s one better than the other? Also, my car 2016 328i x drive was given to me at 61,000 miles. Is there anything I can buy to put in my gas tank with the gas once in a while just to clean out the gas lines? I know they sell stuff like that why or why should I use it? If I should which brand is best? Thanks in advance everyone!
What are you cleaning out? Gasoline has detergents in it, it’s already cleaning “gunk”.
Where do you live that 89 is premium? If you’re in the US, premium is 91. 89 is midgrade.