AeroShell Oil W100 - 1 Quart, Case of 6

AeroShell Oil W100 is a single-grade, ashless dispersant piston engine oil formulated for certified four-stroke aircraft engines, including turbocharged and fuel-injected designs. Its combination of high-viscosity base stocks and nonmetallic dispersant additives helps maintain engine cleanliness, stability, and reliable lubrication under demanding operating conditions.

Unlike straight mineral oils, AeroShell Oil W100 uses ashless dispersant chemistry to keep contaminants suspended rather than allowing them to form deposits. This reduces sludge and varnish buildup on internal engine components, helping to prevent issues such as spark plug fouling or pre-ignition caused by metallic ash residues.

The “W100” designation identifies the oil’s viscosity grade – equivalent to SAE 50 at operating temperatures. The “100” corresponds to its viscosity in Saybolt Universal Seconds at 210°F (99°C), reflecting how the oil flows and protects the engine during typical flight conditions.

AeroShell Oil W100 promotes cleaner engine operation, reduces wear, and helps minimize oil consumption in high-temperature or high-stress environments. Its stable formulation supports engines in reaching their intended Time Between Overhaul (TBO) and ensures consistent lubrication across a broad temperature range.

This oil is suitable for certified four-stroke aircraft engines from manufacturers such as Lycoming, Continental, and Pratt & Whitney. It performs well in both flat and radial engines, meeting key OEM specifications, including Textron Lycoming 301F, Continental MHS 24B, and Pratt & Whitney Service Bulletin 1183-S.

Yes. AeroShell Oil W100 conforms to SAE J-1899 (the successor to MIL-L-22851D) and is approved by multiple global aviation authorities and engine manufacturers. It also meets British (J-1899 SAE 50), French (AIR 3570), and Russian (MS-20) requirements, confirming its international applicability.

The oil contains dispersant and anti-wear additives that create a protective film on critical engine surfaces, reducing friction and scuffing. It also resists oxidation and moisture contamination, safeguarding engine internals from rust and corrosion during use and extended storage.

For hot-weather or radial engine operations, AeroShell Oil W120 is frequently preferred. AeroShell Oil W100 or AeroShell Oil W 15W-50 are well-suited for moderate climates, while W80 is recommended for colder environments due to its improved low-temperature flow characteristics.

Some engines require or permit ashless dispersant oils during break-in – particularly Lycoming O-320H, O/LO-360E, and certain turbocharged models. However, others may specify straight mineral oil instead. Always follow the guidance in the engine manufacturer’s break-in recommendations.

Both oils use the same high-quality base stocks and dispersant additives, but W100 Plus incorporates an additional anti-wear additive similar to Lycoming LW-16702. This extra protection makes W100 Plus a strong option for engines that sit for extended periods or operate in humid climates, while AeroShell W100 is ideal for routine flying and standard operating conditions.

AeroShell Oil W100 is designed to perform best when oil temperatures remain between 180°F (82°C) and 200°F (93°C). Maintaining this range helps ensure proper lubrication, vaporization of contaminants, and overall engine health.

When stored in its original, unopened packaging at normal room temperatures, AeroShell Oil W100 retains its quality for up to four years from the date of manufacture. Storing containers in cool, dry conditions and away from heat or sunlight helps preserve product performance.

Used oil must be taken to an approved recycling or waste-handling facility and should never be disposed of in soil, drainage systems, or water sources. Proper disposal ensures environmental compliance and supports safe aviation maintenance practices.

PJi stocks the full AeroShell piston engine oil lineup, including W100 and W100 Plus, and offers fast shipping on in-stock products. Our aviation specialists are available via phone, email, or live chat to help you select the right oil for your engine and operating environment.