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      07-29-2015, 04:56 PM   #8
BMW135pls
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Drives: Bucket of screws and sadness
Join Date: Jul 2014
Location: NJ, USA

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Quote:
Originally Posted by ShocknAwe View Post
Safe as it gets. Map 5 will auto adjust boost for the octane. It will take at least 3 pulls before you see the full difference.
What do you think of the blend I have going in there now? I found an ethanol calculator online, but I'm actually more confused now than I was before. I'm not good at mathy stuff.

Ok, so I got 3.5g of e85, and 6.3g of 93, with an unknown amount of 93 still left in the tank. After googling, apparently the 135i has a 14g tank. So add up all the 93 and you get 10.5g, then add in the 3.5g of e85 and it's a full tank. The calculator says that would come out to be around 28.8% e85 blend and 96 RM2 oct? I fuel every 200 miles traveled, which usually comes out to be in the vicinity of 10 gallons of refueling when I used straight 93.

At my next fill, how much e85 should I use?
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Model: '08 135i N54 6AT Coupe ///M Sport - E85 + 93 = E30
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