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Old 06-13-2016, 04:07 PM   #4
TJ's Chevy
6 in a row ready to tow
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Join Date: Mar 2013
Location: Southern Oregon
Posts: 10,236
Re: Wore-out Old Spark Plugs

Keep an eye on the new plugs and see what the coloration changes to as you put more miles on. My 305 V6 in my GMC burns a bit of oil. Mainly on a hot start up it will smoke a tad and then it's fine. Plugs are burning really clean though. I think mine burned a quart over the duration of 8 months. lol Might try some thicker oil....maybe 15W-40 Rotella and a can of Engine Restore. I did that and it brought the compression up on my old 292 around 20 pounds!
1966 Chevy C10 "Project Two Tone"
1964 GMC "Crustine" semi-build:
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