Oil filter
Senior Member
Joined: Dec 2003
Posts: 6,550
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From: Mount Airy,MD
You need the FL-820S. The S stands for silicone anti-drainback valve. Without it and with an overhead cam engine, you will get very noisy starts due to no oil at the top of the engine. And excessive wear. Get the FL-820S.
Senior Member
Joined: Oct 2006
Posts: 442
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From: Calvert Co., MD
I always thought the 820S was the short version of the 820, therefore the "s" designation. I believe all motorcrafts have the silicone anti-drainback valve. Both will fit depending on clearance space allowed in the vehicle.
Senior Member
Joined: Dec 2003
Posts: 6,550
Likes: 2
From: Mount Airy,MD
Originally Posted by dlsipe1
I always thought the 820S was the short version of the 820, therefore the "s" designation. I believe all motorcrafts have the silicone anti-drainback valve. Both will fit depending on clearance space allowed in the vehicle.
The FL-820 and FL820S are exactly the same size. The S is for silicone anti-drainback valve.