I moved this post. I realized that I was hijacking another great post, so I moved it for courtesy and clarity.
Now, how low will you go??
Here is the reason that I ask. 93 octane, here in Kentucky, is Premium, with 10% Ethanol added. That same premium, without the Ethanol is listed as 91 octane at some stations, and 90 octane at others. I've polled the tanker drivers, and they all say that premium, is premium, and that all mogas in our area comes out of the same pipeline in Nashville TN. One driver I talked to told me that each retailer adds their own additives. One example being Shell, who he claims adds butane as a cheap filler. He also said that Ethanol adds 3 points to the octane rating. It sounds like the retailers are not all using the same measuring stick. I have several sources for Ethanol Free Premium, and I would love to use it, but I have been shy about using it, because of the questionable accuracy of the measurements. It looks like the highest octane that you can get from mid range mogas is 89. That being said, anything 90 octane, or above, must be premium. I know what the book says, but.... Any thoughts out there?? Would you run the 90, or 91, and feel comfortable with it?
Tom
Now, how low will you go??
Here is the reason that I ask. 93 octane, here in Kentucky, is Premium, with 10% Ethanol added. That same premium, without the Ethanol is listed as 91 octane at some stations, and 90 octane at others. I've polled the tanker drivers, and they all say that premium, is premium, and that all mogas in our area comes out of the same pipeline in Nashville TN. One driver I talked to told me that each retailer adds their own additives. One example being Shell, who he claims adds butane as a cheap filler. He also said that Ethanol adds 3 points to the octane rating. It sounds like the retailers are not all using the same measuring stick. I have several sources for Ethanol Free Premium, and I would love to use it, but I have been shy about using it, because of the questionable accuracy of the measurements. It looks like the highest octane that you can get from mid range mogas is 89. That being said, anything 90 octane, or above, must be premium. I know what the book says, but.... Any thoughts out there?? Would you run the 90, or 91, and feel comfortable with it?
Tom