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Originally Posted by antoniogghaleb
Thank you everyone for all the extremely helpful responses, just one last question, would I have to change the oil viscosity after supercharging too?
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Depends on what your oil temps are.
If your average oil temp is 20F higher than before going up a weight would be good, if you have an oil cooler and its the same temperature as before and wasn’t a problem before then there is no point. You could swap to heavier weight oil just for when you go to the track. Or swap to heavier weight in summer.
The engine was designed for a specific viscosity. Going up in weight when temps are not increased means you will be running with a thicker viscosity than was intended/designed. Not the end of the world going up to the next weight. But temps determine viscosity and weight needed.