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SMH. There's so much to said here but I don't have time.
1. With the OP there's zero problem running 10w-40, actually for spirited driving it's better. Only downside would be if you live in a cold climate (slightly too thick at startup) and ever so slightly worse fuel economy. With high oil temps it will protect better... And yes there will be a protection difference at operating oil temps.
2. LL-01 is not some high standard it's primary focus is fuel efficiency and longer change intervals. There are far better formulas. For one it doesn't have enough zinc for a stressed turbo (tuned). For high performance applications don't feel tied to it.
3. Royal Purple has some of the junkiest additives in that class. Everyone who knows there stuff steers clear of it.
4. If your going to track grab motul xcess 8100.... Don't be cheap. There several other oils... One by amsoil but it escapes me.
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