How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask Steve Your Own Question
Steve, BMW Expert
Category: BMW
Satisfied Customers: 23888
Experience:  BMW Expert
Type Your BMW Question Here...
Steve is online now
A new question is answered every 9 seconds

I bought my first bmw today and i understand to use an

Customer Question

i bought my first bmw today and i understand to use an octane of 91 or better
a freind uses an octane of 87 from costco
I told him this will ruin performance and the engine who is right?
Submitted: 11 months ago.
Category: BMW
Expert:  Steve replied 11 months ago.
I will provide an honest answer. I trust this will be appreciated. Please remember that a low rating PUNISHES me for being honest and that I receive nothing for my time until a positive rating is clicked.
Thank you for your attention to the rating requirement.
It will hurt performance and fuel economy but will not ruin the engine as the engine can adapt to run less efficiently on 87. Please kindly take a moment to provide a positive rating
Please let me know if you have further questions. Please do not forget to click a positive rating as this is the only way I receive credit for my answer, thank you. Best wishes with your vehicle.
Expert:  Steve replied 11 months ago.
If there are no additional questions, as the question has been answered, please kindly click on a positive rating