Well, I can't comment on the additive in question, but my Echo died at around 275k miles...not engine related (coolant leak I was entirely optionally unwilling to pursue). And it was treated poorly before me, it probably had a lot of miles left had I corrected the issue. Good oil and additives will add to an engine's life, but won't make a blah engine into a superhero, IMHO.
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'97 Honda Civic DX Coupe 5MT - dead 2/23
'00 Echo - dead 2/17
'14 Chrysler Town + Country - My DD, for now
'67 Mustang Convertible - gone 1/17
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