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While Infinity tells in owner manual to use Premium (91 AKI) gas will Plus (89 AKI) hurt the engine? Or it will cause degradation of performance only?
 

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Here's FUEL INFORMATION for Q50 from Infiniti
Use unleaded premium gasoline with an octane rating of at least 91 AKI (Anti-Knock
Index) number (Research octane number 96).
If premium gasoline is not available, unleaded regular gasoline with an octane
rating of 87 AKI number (Research octane number 91) may be temporarily used, but
only under the following precautions:
. Have the fuel tank filled only partially with unleaded regular gasoline, and fill
up with unleaded premium gasoline as soon as possible.
. Avoid full throttle driving and abrupt acceleration.
Use unleaded premium gasoline for maximum vehicle performance.
 

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cvipgo has the info ryt there! I read it a while ago and it definitely helps with gasoline costs along with the 28city and 34hwy mpg numbers! :D
 

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The dealer told me I could use regular unleaded!
What!! I'm pretty sure that if it's discovered you've been pumping regular unleaded into your tank, any warranty claims could (and likely would) be denied. Not to mention engine knocking. It clearly states on the tank cap as well to "Use Premium Unleaded Only".


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The homeless guy that lives under the bridge down the street told me I could use regular unleaded so that is what I am going to do. I'm sure he knows more than the engineers at Infiniti do!
:eek:Get it writing so you can sue him later in case your car get funky:p
 

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This week I saw a 100% gasoline pump at Shell. Anyone know if that is just another "best" option for cars that take Premium or for something else??
 

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agreed. hybrids are the way of the future. as electric motors continue to advance they will become more helpful to the gasoline motors.

Looking at many of the future supercars they are moving to turbochargers and electric motors. The age of V12s and V10s is slowly coming to an end.
 
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