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so I just bought this car a week ago and I was told by the salesman to use 89 so thats what Ive been putting in it for the last week but I believe the owner before me was using 93 should I stay at 89 or would it be safe to go to 93 ?
 

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Manual states 91 (or higher) for a 392 powered car.

Welcome and congrats on your ride.
 

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so I just bought this car a week ago and I was told by the salesman to use 89 so thats what Ive been putting in it for the last week but I believe the owner before me was using 93 should I stay at 89 or would it be safe to go to 93 ?
Owner's manual says to use 91 octane or higher. I wouldn't run anything less. Welcome and congratulations on your ride.
 

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Welcome from California ;) Congrats!

A Guy
 

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Welcome to the forum, I run 93 in my 392 SRT all the time.
 

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rule #1. always follow the owners manual.
rule #2. never follow the advice of a car salesman.
;)
congrats & welcome!
 
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