Maybe I got a bad batch, but 3 in a row now have failed me. Last change I installed the normally reliable FL-820S, which is what I usually install on my 5.4L Triton. 500 miles into the change I started to get the brief split second cold start-up clatter. At first it was once every 2 or 3 days, then every day. I changed out the filter with another FL-820S and all was fine for about another 500 miles. Same thing started happening, cold start-up clatter once every 2-3 days, then every day. I changed to a third FL-820S and I'll be ****ed if it didn't start doing the same thing about 300 miles later.
I am now royally concerned, so I switched to a Napa Gold, and it hasn't uttered a sound in 1500 miles. I know what I'll be using from now on, and I'm very disappointed at the lack of quality in a generally perceived high quality part.
