I get my VP-101 unleaded from a local Arco station is that junk too...........
That's not pump gas.
And as far as knowing the percentage drop like MrP said, that still doesn't tell you WHAT they dropped, just how much of it
On the drop sheet they have to show what was dropped
but it will say 87 octane normally.. not very often
will you see 89
My point was, that doesn't tell you what BLEND they dropped in there. Because fuel blends change seasonally. 87 octane is not the same fuel year round. Most guys I know who bracket race with E-85 check it with a hydrometer religiously, or the car runs all over the place, at least around here
I tested every time I bought E-85 from only 1 place... I
used the water tester from QF... the car was always dead
on consistent.... it never varied more than .008 all day
unless there was a BIG change in the weather... I went to
E-85 for 2 main reasons... cheap price and consistency...
it had side effects also... some good(temp) and bad.. it
liked to absorb moisture and corrode things if it sat for
any length of time... that cheap water tester work well..
I even took a sample into work and checked the fuel on our
equipment just so I could verify it
EDIT
when they make E-85 the ethanol always starts at
one point.. NEVER E-100.. its E98... the filler
product is the gas to get it to lite off easier...
so if you check the ethanol content/level it will
vary very little IF its SUMMER grade E-85.... yes
you might see a point or two.. but thats why you test
it.. winter fuel as Monte stated is as low as E-55 and
that shows up in the ethanol water test
