Per the Joe Gibbs website:
Viscosity typical of SAE 10W-30.
Product Features:
•A higher viscosity version of XP1, it offers outstanding high-temperature, high-shear protection.
•Designed for aluminum blocks and looser clearances, it utilizes multiple synthetic base oils and anti-wear and friction reducing additives to reduce friction and fight valve-train wear.
•Compatible with methanol and high octane
race fuels.
•Can be blended with XP0, XP1, XP2 or XP6. Consult our belending guide for blending specifications.
Applications:
•Sprint and Midget engines
•Late Model Stock
•GM Crate engines
•Pro-Cup engines
•360 Sprints
•NASCAR Spec engines
•Hydraulic lifters
•Engines with clearances under .0027
The part that bothers me is : anti-wear and friction reducing additives to reduce friction.
You need friction for proper clutch operation.
If it works, go ahead and use it, but i would switch to a motorcycle oil for wet clutch operation