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Hoozin

Engine Oil: 5W-30 Or 10W-40?

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Hello all,
First post here. Just wanted some opinions on using a thicker 10w-40 oil rather than the recommended 5w-30. I'm going for Castrol Magnatec after hearing good things from various people. In this case its for a high mileage 2NZ-FE. Also, magnetic drain plugs, anybody use them?
Thanks.

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Now it's getting hotter 10w40 is recommended in the owners book. 5w when colder so it warms up quicker

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My oil pressure on idle was quite low with 5-30w fully synthetic. So I changed to 10-40w semi and it sorted it out.

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Used 10w40 in my racer wich worked ok but ran a little hot on track so swopped to 5w30. Baaaaaaad mistake

With these temperatures outside the oil temp goes sky high. So changing to 10w60 and maybe an oil cooler.

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