So Tracy in other words you are strongly disagreeing with ASH's assertion that the carbon buildup on the valves is from combustion by products (e.g. carbon soot)???
When I have looked at the pics of other LLT and LFX engines that HAVE NOT had Seafoam or BG 44K treatments, the valves appeared "wet" with oil. That makes me believe the buildup is from the ingested oil, not combustion by products.
But what do I know? I'm an electrical engineer, not a mechanical or chemical engineer.
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Mods: GM Locking Gas Cap, RS License Plate Frame, SS Brembos, ZL1 FrontEnd, 14/15 Convertible Top
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