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Motor oil is the fluid the engine runs on, but it is not always the best product for parts that may sit during assembly before the oil pump has built pressure. For bearing surfaces, camshaft and lifter contact points, timing components, and other fresh-build contact areas, an engine assembly lube gives those parts a tackier film during the first moments of startup.

The Permatex 81950 Ultra Slick Engine Assembly Lube is a compact 4 oz option for engine assembly work where the goal is to coat the right surfaces before a new or rebuilt engine is started.

What Permatex 81950 is

Permatex lists Ultra Slick Engine Assembly Lube as US item number 81950 in a 4 oz size. The official directions say to apply a liberal coating to engine bearings, camshaft and lifter surfaces, or timing components as the engine is being assembled.

• Parts Universe SKU: PRM-81950
• Manufacturer item number: 81950
• Container size: 4 oz
• Current Parts Universe product title: PERMATEX 81950 Ultra Slick Engine Assembly Lube, 4 oz

When assembly lube is the right buy

Buy assembly lube when the job includes engine parts that need protection before normal oil pressure is established. The practical use case is not topping off a running engine; it is coating parts during assembly so the first startup is not relying on a thin film of oil alone.

• Fresh or rebuilt engine assembly where bearings, camshafts, lifters, valves, guides, rocker shaft assemblies, or timing components are being installed.
• Projects that may sit before startup and need a coating that stays where it was applied.
• Small-shop or DIY rebuild work where a 4 oz bottle is enough for targeted application instead of bulk lubricant.

Where ordinary oil still matters

Assembly lube is not a replacement for filling the engine with the specified oil, priming the oiling system when the service procedure calls for it, or following the engine builder's startup process. Treat it as a targeted assembly product, not as a general engine additive, gasket sealer, threadlocker, or chassis grease.

Use the vehicle, engine, camshaft, bearing, and component manufacturer's instructions for clearances, torque, break-in oil, priming, and first-run procedure. If a component maker calls for a different lubricant or dry installation, follow that instruction.

Application checks before first startup

Permatex's listed suggested applications include engine bearings, camshafts, lifters, valves, guides, and rocker shaft assemblies. The product page also highlights that the lube adheres to component surfaces to help prevent scuffing and galling during initial startup.

• Clean parts first so the lube contacts the metal surface, not grit or machining residue.
• Apply only where the engine or component service information supports assembly lubrication.
• Keep oil passages, pickup screens, sensors, belts, clutches, and friction surfaces free of unintended lubricant.
• Confirm the engine has the correct oil and filter installed before cranking or startup.

Safety notes

Read the current product label and SDS before use. Avoid eye and skin contact, keep the cap closed when not applying the product, and keep shop chemicals away from children, food areas, ignition sources, and drains. The official Permatex page carries a California Proposition 65 cancer warning for this item.

Product details verified before publishing

• Parts Universe product: PERMATEX 81950 Ultra Slick Engine Assembly Lube, 4 oz
• Shopify status: active
• Current Shopify inventory verified as available at publication time
• Official Permatex product page verified US item number 81950 and 4 oz size
• Official Permatex product page verified the listed directions and suggested application areas

Shop the lube and related categories

View Permatex 81950 Ultra Slick Engine Assembly Lube at Parts Universe

• Shop Permatex products
• Shop maintenance and care products
• Shop oil, chemicals, and fluids

Always follow the product label, SDS, and the engine or component manufacturer's service information. Product availability, pricing, chemical rules, and local-use requirements can change after publication.

Spray cleaner is convenient when you only need to flush a surface or wipe a small area. A soak cleaner makes more sense when the part has passages, recesses, or stubborn deposits that need contact time. The Berryman 0996 Chem-Dip Parts Cleaner with Basket is the 96 fl oz can format for small carburetor, throttle body, and parts-cleaning jobs where immersion is the point.

What Berryman 0996 Chem-Dip is

Berryman lists Chem-Dip Carburetor Parts Cleaner part number 0996 as a Net 96 fl oz (2.84 L) can with basket. The manufacturer describes it as an immersion cleaner for carburetor parts and throttle bodies that removes gum, varnish, fuel residue, and other deposits in 15 to 30 minutes without heat, aeration, or agitation.

• Parts Universe SKU: BER-0996
• Manufacturer part number: 0996
• Container format: 96 fl oz / 2.84 L can with basket
• Current Parts Universe product title: BERRYMAN 0996 CHEM-DIP Parts Cleaner with Basket and Armlock, 3/4-Gallon Pail

When immersion cleaning is the better buy

Choose an immersion cleaner when the job involves a removed part that can be soaked and handled safely. Carburetor pieces, throttle body parts, small metal parts, and pieces with hard-to-reach passages are the practical use cases. The included basket helps lower and lift small parts without fishing around in the cleaner.

Choose a spray cleaner instead when the part is still installed, the cleaning area is exposed and simple, or the vehicle service procedure says not to soak the component. Chem-Dip is not a substitute for diagnosis; if the part has electrical faults, damaged plating, worn shafts, cracked housings, or blocked passages that cannot be cleaned safely, replacement or professional service may be the better path.

Material and time checks before soaking

Berryman states that 0996 is safe for use with most plastic and metal carburetor parts and throttle bodies, including steel, aluminum, and their alloys. The manufacturer's public technical answers add an important caution: some grades of aluminum and aluminum alloy can react, so aluminum-based parts should be limited to short dips and checked frequently.

• Remove loose dirt first so the cleaner can contact the deposits that matter.
• Use the shortest effective soak time and inspect the part before repeating.
• For aluminum-based parts, avoid extended soaking; Berryman's guidance points to 30-60 minute dips with a maximum total soak time of 4 hours.
• Do not soak electronics, sensors, sealed assemblies, or any part the vehicle or component maker says should not be immersed.

Safety notes that matter

Parts cleaner deserves the same respect as any garage chemical. Read the current label and SDS before use, work with ventilation, keep the container closed when not in use, and avoid skin and eye contact. Berryman's glove guidance for 0996 calls for general duty impermeable gloves.

• Wear eye protection and chemical-resistant gloves.
• Keep the product away from children, ignition sources, food areas, and drains.
• Do not mix cleaners or pour used cleaner into another unlabeled container.
• Dispose of used cleaner and residue according to local rules.

Product details verified before publishing

• Parts Universe product: BERRYMAN 0996 CHEM-DIP Parts Cleaner with Basket and Armlock, 3/4-Gallon Pail
• Shopify status: active
• Current Shopify inventory verified as available at publication time
• Official Berryman product page verified part number 0996 and 96 fl oz / 2.84 L can with basket
• Official Berryman product page verified the 15 to 30 minute, no-heat/no-agitation cleaning claim for carburetor parts and throttle bodies

Shop the cleaner and related categories

View Berryman 0996 Chem-Dip at Parts Universe

• Shop Berryman products
• Shop detailing and care products
• Shop oil, chemicals, and fluids

Always follow the product label, SDS, and vehicle or component service information. Product availability, pricing, VOC rules, and local-use requirements can change after publication.