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Tim, just a question... Why then is 5W30 used in the 2ZZ in the Celica? Same engine, different placement in the vehicle, but hauling around more weight in the Celica, and we have dual oil coolers. I've never figured that out. You'd think that if the viscocity is so critical, the same engine should require the same viscocity in either car, right? Just trying to make sense of it.
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