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Old 03-30-2018, 08:00 AM   #2 (permalink)
Engineering first
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Join Date: Mar 2009
Location: Huntsville, AL
Posts: 791

14 i3-REx - '14 BMW i3-REx
Last 3: 45.67 mpg (US)

17 Prime Plus - '17 Toyota Prius Prime Plus
90 day: 58.25 mpg (US)
Thanks: 76
Thanked 196 Times in 126 Posts
About four years ago, I tested our Gen-1 and Gen-3 using up to E85. I found that mixing E50 worked without the check engine light. Above this ratio, the error code was a mixture limit (if I remember correctly.) Regardless, the car worked with the spark advanced due to the higher octane rating. I had one start failure on a freezing temperature morning but the second attempt worked fine. Unfortunately, I found it impractical.

The retail price for E85 was significantly higher than the wholesale price of gasoline at 15% and ethanol at 85% ratio. This made E85 too expensive to use versus E10, the cheapest.

Bob Wilson
2019 Std. Range Plus Model 3 - 134 MPG3 || 2014 BMW i3-REx - 117 MPGe, 39 MPG
JuiceBox 40 Pro (240 VAC, 40 A), KHONS portable (120-240 VAC, 12-32 A)
Retired engineer, Huntsville, AL (five times AutoPilot saved.)
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