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Dr Wheelspin Rh.D.
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4,393 Posts
Yeah that's normal, as oil heats up it becomes less viscous, thus the 10w30 rating - 10 for hot weight, 30 for cold weight. Also the stock oil pressure gauge is very inaccurate, especially after 11+ years. Changing out the oil pressure sending unit would probably show you a more correct value, but it's still a slow reacting and inaccurate gauge.
 
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