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Old 05-19-2013, 01:11 AM   #3 (permalink)
Occasionally6
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The variable valve switching isn't because the oil pressure changes. The ECU determines when the variable switching should occur and then uses oil pressure, via solenoid actuated valve, to perform the switching.

Can't you get the answer to the question from the Scangauge?

Changing oil viscosity won't alter the switching point. At worst it would only alter the speed of the actuation. That's of no real consequence.
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