5W16 Break-In Oil Case 12x1 Quart

The 5W16 Break-In Oil Case 12x1 Quart by MAXIMA RACING OILS is a specialized lubricant formulated for the critical first miles of any freshly rebuilt or newly manufactured engine. Break-in oil serves a singular, essential purpose: protecting engine internals during the run-in period when piston rings, valve guides, and bearing surfaces are establishing their final sealing geometry. Whether you're commissioning a freshly bored and stroked build, installing a complete crate engine, or reconditioning a seized motor, this 12-quart case ensures you have adequate supply without the need for multiple smaller purchases.

The 5W viscosity rating at startup temperature ensures rapid oil circulation to critical bearing surfaces during cold engine cranking—vital when tight machining tolerances and fresh metal-to-metal contact demand immediate boundary lubrication. The 16-weight viscosity under operating temperature maintains a protective film layer without excessive drag, allowing ring blowby and friction to work in your favor during the break-in process. MAXIMA's formulation includes anti-wear additives and rust inhibitors that shield fresh cylinder walls and bearing journals from corrosion while the engine seasons. This targeted chemistry differs fundamentally from conventional multi-grade oils, which lack the additive package needed for rapid ring seating and micro-welding prevention.

High-performance builders, restoration shops, and engine reconditioning specialists rely on dedicated break-in oil to avoid catastrophic scuffing, ring stiction, and premature bearing wear during the first 500–1,000 break-in miles. The 12-quart case format (twelve 1-quart bottles) provides convenient portioning for multiple engine projects or ensures you have reserve for top-ups during extended break-in runs without waste. Use this oil exclusively during the manufacturer's recommended break-in period, then drain completely and switch to your engine's specified service oil. Compatibility spans all naturally aspirated and forced-induction gasoline engines; always confirm your engine builder's break-in protocol before installation.