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  1. F30 / F31 / F32 / F33 / F34 / F36 (2012 - current)
    So I've got a very new 2018 320i. What's the conventional wisdom on the appropriate grade of gas to use? First inclination is to stick with Premium/93, but is it really making a difference on engine wear, crud build-up, or anything else?
  2. X3 E83 (2004 - 2010)
    Hey everyone, I’m very clearly new to these boards but as made evident by the title, I’m also a new BMW owner as well! Additionally, this is the first European car I’ve ever owned as well so a lot of firsts here. Now onto my questions: 1.) the manual says it requires 5W-40 full synth. I have...
  3. F30 / F31 / F32 / F33 / F34 / F36 (2012 - current)
    Hi all, I've noticed my 2017 330i has less acceleration than my 2014 328i did. I've always used regular gas. I know BMW recommends 91 octane. How many milliseconds from my 0-60 will I shave if I switch from 87 to 91 octane? I've been googling and I find a lot of opinions but no actual hard...
  4. E90/E91/E92/E93 (2006 - 2013)
    My wife has been putting 87 octane In the car, And now it is running like crap. I put octane boost in and it's not seeming to do anything. I put a computer on it this morning and it's showing misfires on 1,3,5. Should I start with just replacing the spark plugs before I worrie about the coils...
  5. E90/E92/E93 M3 (2008 - 2014)
    Greetings Bimmerfest, glad to be back (previous owner of (2) X3s and a 328Xi). I recently graduated from a 2010 Mini Cooper JCW to a 2011 e92 M3 ZCP with 18k miles. What a difference! In any case, I have been orienting myself to the new car, doing some small cleanup work (rejuvenating rubber...
  6. E90/E91/E92/E93 (2006 - 2013)
    At a local gas station, I have the option of 93 octane with ethanol, or 90 octane without ethanol. I've tried both and can't tell any difference. Any opinions on which this V8 would prefer?
  7. E39 (1997 - 2003)
    So I recently bought a 2001 530i and everything was fine until the service engine soon light came up. The car passed the smog when I bought it so I'm confused on what this could be. My gas cap is closed tight, and I just did an oil change. One thing that I do think it could be is the gas. I'm...
  8. E60 M5 (2006 - 2010)
    What are peoples thoughts on high octane fuel? Is it necessary to use high octane fuels such as Shell Vpower or Tesco momentum in high performance cars like the M5, is there any benefit in these fuels or are they a waste of money?
  9. E39 (1997 - 2003)
    Ever since I had my baby, I been using 87 the first week. I later found out bmw's are supposed to run higher octane. So 1 day I took a look at my gas cap and it says to run 91 'premium' but where I live I only have 89 and 93 and of course 87. So ever since I noticed that I started using 89 1...
  10. E90/E91/E92/E93 (2006 - 2013)
    Hi Everyone, I shipped my 335i convertible to California from Texas and have been driving on 91 octane since January. These are the things I noticed since switching. 1. Then engine runs hotter, even though the L.A. weather is on average 10-20º cooler than Texas. It does not matter if it's...
  11. E30 (1982 - 1993)
    I have been running supreme since day one, with the prices of gas now a days,would it hurt to just run regular(87) or mid grade(89)?
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