Octane?? 87 vs 94

brob

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What is the recommended octane level for the 5.0 engine.

My Car didn't come with a instruction booklet so im not sure if it supposed to take premium or not. So ive been putting in regular.

I don't what over pay for premium if its a waste. could you help me out?
 
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brob

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Thats all i needed to know. Thank you.
 
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91paxmustang

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Unless your car pings with 87 at 10 degrees. My 94 at 6 degrees would ping with 87. With 93, or 94 i can run between 10-14 w/o a problem
 

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