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Old 09-01-2014, 02:09 AM   #3 (permalink)
oil pan 4
EV convert
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Join Date: Jul 2011
Location: NewMexico (USA)
Posts: 9,808

Sub - '84 Chevy Diesel Suburban C10
90 day: 19.5 mpg (US)

camaro - '85 Chevy Camaro Z28

Riot - '03 Kia Rio POS
Team Hyundai
90 day: 30.21 mpg (US)

Bug - '01 VW Beetle GLSturbo
90 day: 26.43 mpg (US)

Sub2500 - '86 GMC Suburban C2500
90 day: 11.95 mpg (US)

Snow flake - '11 Nissan Leaf SL
90 day: 141.63 mpg (US)
Thanks: 233
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It depends on the vehicle.

In the bug, it gets up to 3mpg better with midgrade gas and I know of no source of ethanol free gas other than RUG. So for that one ethanol free does not get the bug better milage.

When we had a 4.6L 2000ym Lincoln town car there was up to a 2 MPG difference on ethanol free, so it wasn't worth the higher price of the ethanol free.

The 2008 3.3L Hyundai sonata gets 3 to 4 mpg better on ethanol free so for that car it is worth it when we can get eFree.

Bottom line, test it.
1984 chevy suburban, custom made 6.5L diesel turbocharged with a Garrett T76 and Holset HE351VE, 22:1 compression 13psi of intercooled boost.
1989 firebird mostly stock. Aside from the 6-speed manual trans, corvette gen 5 front brakes, 1LE drive shaft, 4th Gen disc brake fbody rear end.
2011 leaf SL, white, portable 240v CHAdeMO, trailer hitch, new batt as of 2014.
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