There is a big difference between silicone (the stuff used to make RTV
sealant, lubricants, breast implants...) and silicon (sand, computer chips,
abrasives...). What was found in the oil was the latter, silicon. Silicon in
the oil could have come from the pistons (si-al alloy), or, as a remote
possibility, sand/grit drawn into the engine's air intake system, and
somehow finding its way into the oil. This is possible. But in any case, we
are not talking about silicone here! -Bill
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