Half Tank 89 Octane + Half Tank 93 Octane = 91 Octane?
06-21-12, 06:36 PM
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Half Tank 89 Octane + Half Tank 93 Octane = 91 Octane?
Hi guys! I hate to start a thread on what gas to use for my car when I know there are conservatively 200 threads on this topic but I searched and couldn't find an answer to this question..
Basically, the gas stations around where I live have 87, 89, and 93 octane. It's my understanding that the IS is optimized for 91 octane. Instead of paying more (albeit only a little more) for 93 octane that my car doesn't need, would it be bad for the car to fill it half way with 89 and then fill the rest of the way with 93 octane?
Apologies if this is a stupid question but any thoughts would be appreciated. Thanks a lot!
Basically, the gas stations around where I live have 87, 89, and 93 octane. It's my understanding that the IS is optimized for 91 octane. Instead of paying more (albeit only a little more) for 93 octane that my car doesn't need, would it be bad for the car to fill it half way with 89 and then fill the rest of the way with 93 octane?
Apologies if this is a stupid question but any thoughts would be appreciated. Thanks a lot!
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