Premium or Regular unleaded ??

[jewc75]

Ive also never heard of seen a BMW engine failure.

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[eRay]

I use 90 octane non ethanol. It is even more expensive than Premium but I hate ethanol.

 

[Eagle11]

Ive also never heard of seen a BMW engine failure.

They failure points but if you take care of those items (My cars they have) the engines themselves are basically built proof.

 

[Haha48]

First fill up 87 second 92 thirs 94. Price difference 20 bucks a fill. Runs smoother on the higher grade. Get the same mpg though.

 

[Revengeman01]

Premium! Better MPG and Performance.

 

[FESTUS]

I started using mid grade 89octane and im avg 27 -28 mpg around town and i have a 2.0 eco boost.

 

[MavDave]

I have 2500 on my EB the last tank I tried 90 octane ethanol free and there was a noticeable performance difference. Also the first 1/4 tank was all highway and the dash reported 32mpg (I also have the tow package it is rated at 29) for the .25 per gallon price difference I will run this at every opportunity.

 

[Area51BS]

No mention of 89. Maybe not the performance of 93. But possibly no knock in warm weather as some say.

 

[MavDave]

No mention of 89. Maybe not the performance of 93. But possibly no knock in warm weather as some say.

I was actually thinking it could be a good compromise. But here in Houston were already into triple digits so I may wait until fall to try it

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