I wanted to start using the Motorcraft
FL-820s filter - the dealer told me the FL-820 is the SAME filter. Is he correct - does the FL820 have the anti-drain valve in it as well ?

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1997 Expedition EB, Laser Red, 5.4L, Tow Package, 3.73 Limited Slip,all the goodies exept rear seat - so far - no mods

 

When I got my '97, the FL-820 was specified. After a while, the -820 was replaced by the -820s in stores. I don't think I could find an old -820 anywhere anymore (nor would I want to). The improved filter, the -820s, has a silicone rubber valve in it.

 

Granpa's right. It is the same and it's not the same. Get it? "Silly cone" anti-drain back valve = S.

 

FL820S is what you want. The silicone valve helps to keep the engine valves from rattling at start up...and it does a great job of doing this.

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2000 F-150 XLT, 4x2, Superchipped 5.4L Supercab, Styleside, Black with silver two-tone, 3.55 rear, class III towing package with heavy duty cooling package, 4 wheel disk ABS, overhead console, sliding rear window, keyless entry, dark graphite interior, in dash CD, factory leather wrapped steering wheel, Pendaliner bedliner, K&N air filter, rubberized undercoating, cabin filtration system, Bugflector II, 5W-30 Mobil 1, engine build 10/4/99