Keep clean, contaminant-free fuel flowing to your injection system with the WIX Spin-On Fuel Filter 33218, a heavy-duty (HD) filter that traps particles from the fuel before they reach downstream fuel components. It drops in as a direct-fit replacement for a long list of MACK medium- and heavy-duty trucks — including CM-, CS- and MS-series MID-LINER models from 1980 through 2003, spanning the 6-7.8L, 6-9.8L, L6-5.5L, L6-6.2L and L6-8.8L engines — so check the Buyer's Guide tab for the full application list.
- HD application-specific media: high-efficiency filtration built for medium and heavy trucks, farm, construction, mining and similar equipment.
- 6-micron Enhanced Cellulose media: screens fine particulate out of the fuel.
- Durable build: high-strength, corrosion-resistant can, center tube and end caps with sealing components help resist leaks under many operating conditions.
- Spin-on design: 7/8-16 thread with a 350 PSI burst-pressure rating; WIX recommends it for OEM fuel filter change intervals.
If a clogged or restricted fuel filter is the cause of hard starting, hesitation or a loss of power, replacing it with this filter helps restore proper fuel flow. Made in the United States. Each listed application uses one filter.
Interchange: Manufacturer part number 33218.
Frequently Asked Questions
What type of filter is the WIX 33218?
It's a heavy-duty spin-on fuel filter with 6-micron Enhanced Cellulose media, a 7/8-16 thread and a 350 PSI burst-pressure rating.
Which vehicles does it fit?
It's listed for MACK medium- and heavy-duty trucks, including CM, CS- and MS-series MID-LINER models (1980-2003) with 6-7.8L, 6-9.8L, L6-5.5L, L6-6.2L and L6-8.8L engines — see the Buyer's Guide tab.
How many filters do I need?
The listed applications use one filter each, and this listing is for a single filter.
What does the 6-micron rating mean?
The Enhanced Cellulose media is designed to capture particles down to about 6 microns, straining fine contaminants from the fuel.
What are signs the fuel filter may need replacing?
Hard starting, hesitation, rough running or a loss of power can be signs of a clogged fuel filter. Diagnose the cause first, since these symptoms can have other causes.
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