Because of the structure of horizontally opposed engines, gravity makes the oil film on the upper cylinder liner more prone to breaking, increasing the likelihood of solid contact between the piston skirt and liner. The engine’s overall length (crankshaft) is also very short, and the crankshaft bearings are narrow, requiring a stronger oil film.

ZERO SP Titanium Engine Oil addresses these weaknesses. At the pistons, its strong oil-film retention prevents combustion pressure leakage, resulting in increased torque and power. At the crankshaft bearings, it also protects against oil-film breakdown. Shafts rotating around their axes, such as the crankshaft and camshafts, are supported by a strong oil film and rotate more consistently around their centers, producing perceptible reductions in vibration and noise and improvements in response and feel. To further reduce friction, a special process incorporates liquefied spherical titanium with a particle diameter of 21 nm (nanometers) or less. This improves extreme-pressure and shear resistance, while the round particles create a bearing effect that dramatically improves response. This engine lubricant specifically for horizontally opposed engines also offers excellent wear resistance, resistance to heat-related seizure, performance retention and dry-start prevention.