Mobil 1 M1-303A Engine Oil Filter

Mobil 1 M1-303A Engine Oil Filter

The Mobil 1 M1-303A is a spin-on engine oil filter built for light-duty gasoline and diesel applications that call for a 13/16"-16 UNS thread and a lathe-cut gasket. It includes an anti-drain back valve and a bypass relief valve to support oil flow control during startup and under restriction.

Compatible With Chevrolet Silverado 2500 HD, Chevrolet Silverado 3500 HD, GMC Sierra 2500 HD, GMC Sierra 3500 HD, and related Express, Savana, and Hummer H1 applications listed below, this filter is a direct replacement for many OE and aftermarket part numbers. The Mobil 1 M1-303A is also cross-referenced to Wix 57202 for the same application.

Key Features

• Spin-on lube filter design for straightforward service replacement
• Anti-drain back valve helps retain oil in the filter after shutdown
• Bypass relief valve set at 8-16 for controlled oil delivery when flow is restricted
• Lathe-cut gasket for a precise sealing surface
• 5.38-inch height with 3.68-inch outside diameter
• 13/16"-16 UNS thread size
• Mobil 1 M1-303A replacement filter for select GM heavy-duty and van applications

Detailed Description

Built as a spin-on engine oil filter, the Mobil 1 M1-303A is sized for select Chevrolet Silverado 2500 HD and 3500 HD, GMC Sierra 2500 HD and 3500 HD, Chevrolet Express, GMC Savana, and 2006 Hummer H1 applications shown in the fitment data. Its anti-drain back valve helps keep the filter full between starts, while the bypass relief valve provides an alternate oil path if the media becomes restricted. That combination supports consistent oil circulation in demanding service intervals and heavy-duty use.

With a 3.78-inch top and bottom outer diameter, 5.38-inch height, and lathe-cut gasket, the M1-303A is built for a secure seal and proper fit where this filter specification is required. If you are searching for a Mobil 1 oil filter for Chevrolet Silverado 2500 HD or GMC Sierra 3500 HD, this part number is a direct match for the listed applications.

Vehicle Fitment

• Fits 2016-2019 Chevrolet Silverado 2500 HD, N/A
• Fits 2001-2010 Chevrolet Silverado 2500 HD, N/A
• Fits 2016-2019 Chevrolet Silverado 3500 HD, N/A
• Fits 2007-2010 Chevrolet Silverado 3500 HD, N/A
• Fits 2016-2019 GMC Sierra 2500 HD, N/A
• Fits 2001-2010 GMC Sierra 2500 HD, N/A
• Fits 2016-2019 GMC Sierra 3500 HD, N/A
• Fits 2007-2010 GMC Sierra 3500 HD, N/A
• Fits 2016 Chevrolet Express 2500, N/A
• Fits 2011-2014 Chevrolet Express 2500, N/A
• Fits 2016 Chevrolet Express 3500, N/A
• Fits 2011-2014 Chevrolet Express 3500, N/A
• Fits 2016 GMC Savana 2500, N/A
• Fits 2006-2010 GMC Savana 2500, N/A
• Fits 2016 GMC Savana 3500, N/A
• Fits 2006-2010 GMC Savana 3500, N/A
• Fits 2015 Chevrolet Express 2500, N/A
• Fits 2006-2010 Chevrolet Express 2500, N/A
• Fits 2015 Chevrolet Express 3500, N/A
• Fits 2006-2010 Chevrolet Express 3500, N/A
• Fits 2011-2015 Chevrolet Silverado 2500 HD, N/A
• Fits 2011-2015 Chevrolet Silverado 3500 HD, N/A
• Fits 2011-2015 GMC Savana 2500, N/A
• Fits 2011-2015 GMC Savana 3500, N/A
• Fits 2011-2015 GMC Sierra 2500 HD, N/A
• Fits 2011-2015 GMC Sierra 3500 HD, N/A
• Fits 2007 Chevrolet Silverado 2500 HD Classic, N/A
• Fits 2007 Chevrolet Silverado 3500 Classic, N/A
• Fits 2007 GMC Sierra 2500 HD Classic, N/A
• Fits 2007 GMC Sierra 3500 Classic, N/A
• Fits 2001-2006 Chevrolet Silverado 3500, N/A
• Fits 2001-2006 GMC Sierra 3500, N/A
• Fits 2006 Hummer H1, N/A

Common Uses

• Replacing a worn or clogged oil filter on GM heavy-duty trucks and vans
• Restoring proper oil filtration after routine maintenance
• Addressing startup oil drain-back concerns on listed applications
• Supporting oil flow management when the filter media reaches restriction limits
• Matching OE-style thread, gasket, and size requirements for listed vehicles

Installation Notes

Verify the thread size, gasket style, height, and outside diameter before installation. Confirm the vehicle’s engine oil filter specification against the fitment list, especially on Chevrolet Silverado 2500 HD, GMC Sierra 3500 HD, and Chevrolet Express applications that note synthetic oil use and premium filter recommendation. Replace the filter during a standard oil service and check for proper sealing after startup.

Quality Assurance

Mobil 1 filters are built to published dimensional and valve specifications for the listed applications. The M1-303A uses a spin-on design with an anti-drain back valve, bypass relief valve, and lathe-cut gasket to meet the requirements shown in the product data.