Thank you Explorerinil for the BITOG link. Always a good read.
I'd be wanting higher flow and a finer micron rating. Standing by....
I caved and asked the Artificial Mind of the Go0gle:
Yes, the Ford Performance (Ford Racing) variation (part number CM-6731-FL820) will capture finer particulates and provide better overall filtration than the standard Motorcraft FL-820S.
While the standard factory filter is a highly reliable baseline engineered by Ford, upgrading to the Ford Performance version changes the internal filtering capabilities significantly. [
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Media and Filtering Differences
| Feature | Motorcraft FL-820S (Standard OEM) | Ford Performance CM-6731-FL820 |
|---|
| Media Type | Traditional Cellulose / Synthetic-Blend | 100% Fully Synthetic Media |
| Filtering Capacity | Baseline standard | Up to 50% more capacity |
| Particulate Efficiency | Typically rated around 80% at 20 microns | Finer multi-pass efficiency (approx. 98% at 20 microns) |
| Canister Strength | Standard gauge steel | Heavy-gauge steel (higher burst pressure) |
Why the Ford Performance Version Filters Finer Particulates
- Synthetic Media vs. Cellulose: The biggest factor in capturing smaller micron particles is the media material. Standard Motorcraft filters rely heavily on cellulose (paper) fibers, which have larger, irregular gaps. The Ford Performance filter utilizes synthetic media with uniform, tightly woven fibers. This allows it to trap microscopic wear metals and smaller soot/carbon particulates that would otherwise pass right through a standard cellulose filter.
- Increased Media Surface Area: The synthetic pleating design allows for a higher density of pleats without restricting oil flow, meaning it can hold significantly more trapped material before reaching its capacity limit. [1]
- No Flow Trade-Off: Usually, tighter filtration means more resistance to oil flow. However, synthetic fibers are thinner than cellulose fibers, meaning the Ford Performance version provides finer filtration while maintaining excellent flow characteristics—critical for the high-volume oiling demands of the 7.3L Godzilla engine.
A Critical Note on the Bypass Valve
Both filters utilize a
base-end relief (bypass) valve. This is incredibly important for the Godzilla engine layout. If the filter media ever becomes completely restricted or the oil is highly viscous during a freezing winter startup, the valve opens at the base rather than the top. This ensures that bypassed oil doesn't wash over the dirty side of the filter and dump trapped contaminants back directly into your engine bearings. [
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The Takeaway for Your Tremor
For standard daily driving and routine service intervals, the stock
FL-820S is entirely adequate and proven. However, if you are subjecting your F350 Tremor to severe duty cycles—such as heavy
towing, dusty off-road environments, or extended oil change intervals—the
Ford Performance filter is a highly beneficial upgrade for keeping your oil chemically and physically cleaner. [
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