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Synthetic Oil and Weight Questions

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Old 05-02-2012, 05:05 PM   #1
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Synthetic Oil and Weight Questions

I have a 2003 Tacoma 2.4L and I have decided to switch to synthetic oil. I know the manual says to use 5w-30 but the Toyota dealer in my area has always told me to use 10w-30 (I think because of the weather in southern California). If I change to synthetic oil, should I stick with 10w-30 as that's what my has always used for conventional oil or should I switch to 5w-30 as per manual?
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Old 05-02-2012, 06:50 PM   #2
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5w30

Synthetic holds it's viscosity better at higher temperatures.

Expect slightly lower oil pressure at idle.
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