minus-squareOnionMiasma@alien.topBtoBMW@gearhead.town•Ethanol free gas, should I be using it, place by me offers ethanol free (90) Or stick to my regular premium (89)?linkfedilinkEnglisharrow-up1·1 year agoMy 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. linkfedilink
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.