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!

  • lk0stov@alien.topBEnglish
    1·
    10 months ago

    If I could pour ethanol free petrol I definitely would. Damn EU regulations require 10% of petrol to be ethanol, which causes a ton of issues in the long run.

  • Unspec7@alien.topBEnglish
    1·
    10 months ago

    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.

    • OnionMiasma@alien.topBEnglish
      1·
      10 months ago

      My 540i says 89 is required, and what is available may depend on where OP is. If he’s in Denver, Premium is probably 89 or 90 because the elevation means higher octane isn’t as necessary.

  • unpolire@alien.topBEnglish
    1·
    10 months ago

    Look at your manual’s gas requirements page. It most likely says that 91 is highly recommended but using 87 will not result in engine damage. I have found that Costco gasoline, in personal testing of my cars of all types, has caused noticeable benefits in operation. As an additive, Chevron Techron has been proven to work, if you are adding it to other brand fuels. I don’t use additives with Costco gasoline. Costco has a proprietary blend produced for them by a variety of major fuel distributors. It’s “Top Tier” gasoline.

    • rabidmongoose15@alien.topBEnglish
      1·
      10 months ago

      e85 has 100+ octane. I mix a couple gallons with premium to handle the increased boost my car is making.

      • Gilbert_Goldfish@alien.topBEnglish
        1·
        10 months ago

        Great callout, I took an assumptive leap here and forgot about e85. It seems like the prudent call to dilute with premium for longevity. Yet to see a fuel pump in North East USA with e85, would love to have the option though