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Old 10-14-2012, 09:06 PM   #1
Mister-B
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Join Date: Oct 2012
Location: Salt Lake City, Utah
Posts: 3,331
Do you use premium unleaded in your 350?

Just bought a '69 with a rebuilt 350 V8. The tank was almost empty, so I put 91 octane premium unleaded in. Now, it seems like I'm running a bit lean. It's a little harder to start than usual, but I'm not sure if it could also be due to the colder weather.

Should I run premium or not? Should I adjust anything since it is getting colder?
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