Larger oil filter causes lower oil pressure

[prodjay10]

When I changed the oil this last time I went with the larger of the two oil filters acdelco recommends for my 2002 5.3. I thought bigger equals better.

Well I noticed a drop in oil pressure right after the oil change. At idle 550 rpm and operating temp it was less than 20 psi on the mechanical gauge. Once I replaced it with the shorter oil filter oil pressure jumped back to 30 psi at idle and operating temp.

Y’all probably know this but I thought I’d share my experience anyway just in case. I thought I had messed something up.
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