Quote:
Originally Posted by chrisgerman1983
i have always had good luck with it until recently  used it in the wife's rav4 with 120000km in it and now the valve seals are leaking pretty badly... but it runs and starts smoother...
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This sounds more like coincidence than cause/effect to me. Probably your old seals were about to go anyway, or you noticed the leak because you were paying closer attention. I bet they're not related.