Pump gas octane rating

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Pump gas octane rating

Post  litshoot on April 25th 2018, 10:22 am

Hi
Does anyone know if pump fas octane rating is including the 10-15% ethanol that is added in my area. Meaning is that 92 actually 92, or does it get a little bump by higher ethanol content.  I would assume the effect is minimal

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Re: Pump gas octane rating

Post  BBFTorino on April 26th 2018, 1:19 am

Don't know where your area is, but here in California, the octane ratings have been bogus for many years.
The 87 octane is really like 85.
The 89 is like 87, and the 91 is like 89.

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