AMSOIL ENGINE ASSEMBLY LUBE

AMSOIL Engine Assembly Lube delivers tenacious, long-lasting protection for critical engine components during the build process and through that nerve-wracking first startup. It is purpose-built for anyone assembling or rebuilding a four-stroke engine, from flat-tappet cam LS swaps to high-RPM naturally aspirated race motors.

The moment you fire a freshly built engine, oil pressure is essentially zero. Camshaft lobes, lifters, rocker arms, wrist pins, and bearings are running metal-on-metal for those first critical seconds. If whatever you coated those parts with during assembly has dried out, migrated off, or failed to stay put, you risk scuffing, galling, or outright failure before the engine ever makes a lap or leaves the driveway. That window of vulnerability is exactly what assembly lube exists to address, and not all assembly lubes handle it equally well.

TENACIOUS CLING THAT LASTS FOR MONTHS
Engine builds rarely happen over a weekend. Parts sit on the bench, partially assembled short blocks sit in garages, and projects stall out for weeks or months at a time. AMSOIL Engine Assembly Lube is formulated with a high-viscosity base oil and a unique tackifier that keeps the lube film right where you applied it, even over extended storage periods. It does not drip off bearing surfaces, cam lobes, or cylinder walls the way thinner products can.

HIGH ANTI-WEAR ADDITIVE CONTENT
Cling alone is not enough. The lube film itself has to resist the extreme loading that occurs at initial startup, particularly on flat-tappet camshafts and high-spring-pressure valvetrain setups where contact pressures are severe. AMSOIL Engine Assembly Lube is loaded with anti-wear additives that provide a sacrificial protective layer between metal surfaces during that brief period before oil pressure builds and full-flow lubrication takes over. This is especially relevant for builders running aggressive cam profiles on LS, small-block Chevy, or big-block Ford engines where cam lobe and lifter scuffing during break-in remains a persistent concern.

DISSOLVES CLEANLY IN OIL
This is where AMSOIL Engine Assembly Lube separates itself from grease-based alternatives. Products that rely on a grease carrier can leave behind residue that clogs oil passages, galleries, and ports. A blocked oil port in a freshly built engine is a catastrophic failure waiting to happen. AMSOIL Engine Assembly Lube is designed to dissolve fully into the motor oil once the engine is running, keeping oil ports clean and preventing deposit formation under valve covers and in the oil pan. You get the protection you need during assembly and startup without introducing contamination into the oiling system.

RUST AND CORROSION PROTECTION DURING STORAGE
A bare iron or steel surface exposed to garage humidity will start forming surface rust surprisingly fast. AMSOIL Engine Assembly Lube contains dedicated rust and corrosion inhibitors that protect exposed metal components during the build process. If your short block is going to sit for a few weeks while you source parts or wait on machine work, the lube film actively resists moisture and oxidation on every surface it contacts.

PRECISE, CLEAN APPLICATION
AMSOIL Engine Assembly Lube comes in a 4-ounce squeeze tube rather than a tub. This makes targeted application to cam lobes, bearing journals, piston skirts, and wrist pins much cleaner and more controlled. Less mess on your hands, less waste on the bench, and better coverage exactly where you need it.

APPLICATIONS AND COMPATIBILITY
Recommended for any new or rebuilt four-stroke engine, including racing, performance, and stock applications. Apply to all areas susceptible to initial startup wear: camshaft lobes, lifters, rocker arm tips, pushrod ends, piston pins, ring lands, cylinder walls, crankshaft and rod bearing surfaces, and timing chain or gear contact surfaces. Compatible with conventional, synthetic blend, and full synthetic motor oils.