|
You can't always tell the ethanol content by brand. Fuel is mixed as it comes out of the tanker. In some places with less regulation, 2 shell stations in the same town may have different mixes (from what I’ve gleaned). The same tanker may also service different station (brands).
The problem with ethanol is that it technically is the correct octane but it burns slower. Think of real 91 oct fuel going “pop” in your cylinder and high ethanol going fizzzzzle in your cylinder. Hotter and less bang (power).
In California everything switches to “winter formula” of 10% ethanol and is legally to be clearly marked. The rest of the year, who knows knows.
I sometimes mix with 100 oct race fuel which is also another crap shoot. It to can be mixed down to with ethanol. Most likely still better than 91,93, etc. Another trick is adding Toluene which is very high, good octane and is a regular component in gasoline in smaller doses (so it doesn’t damage any thing).
Just a little background to further confuse the issue (grin)
Regards, PK
|