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I've checked at some Esso stations and seen the "may contain up to 10% ethanol" sticker. I have heard that Ultramar uses Shell gas. The two Ultramar stations near me do not have the sticker, so presumably, do not have Ethanol in the 91. I have found that my car runs best on Petro Canada's Ultra 94. However, that stuff really gets the crickets going. If I use Shell's 91, the crickets go away.
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no man with a good car needs to be justified...
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