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post #8 of (permalink) Old 10-22-2008, 10:56 AM
Join Date: Oct 2008
Location: Brampton
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I was told by the dealer that my car requires 94 octane I had been using 91 before that but I use 94 now. Which is only available at Sunoco here in Canada. Itís not the price I'm worried about itís only a $5 difference per tank but the question is do I really require 94 or is 91 just as fine.

I drive a 06 IS 250 AWD

Also the car starts going crazy with the AVG Tank MPG after i fill up I'm not sure which reading I'm suppose to look at.
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