You cannot use off-the-shelf 15W-40. The XXXL-Formula requires with a high-zinc (ZDDP) content of at least 2,200 ppm. Oil change intervals drop to 50 hours, but bearing wear actually decreases compared to a stock engine, provided the oil temperature is kept strictly between 210°F and 230°F.
⚠️ Some unverified versions have been found in lab tests to contain undeclared sildenafil (Viagra’s active ingredient) or tadalafil (Cialis). These are prescription drugs and can cause dangerous blood pressure drops if combined with nitrates. Horse power xxxl-formula
If you are looking to improve , ensure you are purchasing the Liquid Fuel Additive You cannot use off-the-shelf 15W-40