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Old 10-20-2009, 03:32 PM   #1
bpeters5814
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Join Date: Apr 2008
Location: Worms, Nebraska
Posts: 304
8.1 Oil Pressure

My grandpa's got a 99 regular cab long bed with an 8.1 It's got about 99000 miles on it and only gets driven about 3500 miles a year (mostly only used to pull a cattle trailer). I was driving it while my truck was in the shop and noticed the oil pressure gauge would be around 40 at startup but drop to 25 and stay there after it warmed up. Is this normal for these motors?
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