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I responded previously about the '11 1LS I owned before my current Camaro. It burned about 1qt every 2500 miles. I just wanted to mention that it too always had a lot of black soot around the tail pipes that I constantly had to clean. I was dreading that a bit when I got the 1LE I have now with the NPP (4 tail pipes to clean), but I haven't had anything like that coming out of the LS3 yet. That LLT in the LS was a good running engine, but it did make me paranoid about pulling the dip stick to check on it every fuel up or every two weeks whichever came first. Been checking my LS3 pretty often too because of that habit, but haven't noticed low levels yet where I needed to add any oil. I half expected it to be worse with the V8, but so far so good.
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