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I just changed the oil and filter in my LLY Used a Mobil M1 303a filter and the same oil I always use. I normally use a Napa Gold filter.

Before I changed the oil my oil pressure was about 10 at idle and 38 at 60 mph
Took truck out and drove it right after changed the oil. for about 10 miles.
Now at idle oil pressure is about 5 and about 22 at 60 mph

Anyone else have a problem like this??? It almost has to be the filter.
 

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Kind of a problem of perspective isn't it? New oil, new oil filter, less restriction, lower pressure. Old oil, old filter, more restriction, more pressure.

How are you determining the oil pressure?
 

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Oil your using? MOBIL 1 ? 0W40 ? Fresh Synthetic will show up with those kinds of pressure... Synthetic is always going to be easier to flow than Organic Oil....MO
 
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