Perhaps you could send a data log the the tuner or supercharger manufacturer. Or, maybe change back to 5w30 and see if the problem goes away.
Ford Performance and Roush says use 5W-50 when a supercharger goes on. So if 5W-50 caused issues you'd probably hear about it from them, and they wouldn't be using 5W-50 if it caused problems.
), and so would 5w50 oil used on a stock engine, due to extra friction and lack of proper lubrication (especially the cams). Thicker oil is not always better. But yes, you need it with a supercharger for the extra stress and heat put on the engine by it. There's absolutely no need for 5w50 on a stock engine, period. It'd be debatable on a strictly track car, but not on a street one. But to each his own.I was also cautious of changing oil grade but I think a few companies like Roush and Whipple recommend 5w50 for warranty purposes. As for daily driving the 50 weight just means it won’t thin out as much as a 30 weight during extreme temps. Apparently it shouldn’t affect daily driving when comparing 30 and 50 weight (and the 50 weight is usually more expensive due to the protective characteristics of the higher weight oil)Well, a supercharger is going to decrease the engine life (you know that, right?
