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First off, I am not an oil expert
IIRC from something I read, the purpose of low viscosity Multi weight oil is that it is thin enough to flow easially when the engine is bone cold. As the engine warms up it acts like thicker oil hence 0-40w. The colder the climate, the thinner the oil that is needed
If I am wrong, don't flame me
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2004 Boxster S 6 speed - DRL relay hack, Polaris AutoTop DIY
2004 996 Targa Tip
Instructor - San Diego region
2014 Porsche Performance Driving School
2020 BMW X3, 2013 Ram 1500, 2016 Cmax, 2004 F-150 "Big Red"
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