Did my first UOA on my 2000 Jeep Cherokee. It's got 99,500 miles on it (original owner!). I've been running PYB for the last few years, changing the oil every 6 months. My OCIs are usually in the 3,000 mile range, including this one. Jeep gets a good mix of driving. I'm really pleased with the results, particularly the iron number.
"Wear metals look great in this first sample from your Jeep. Universal averages show typical wear after about 4,100 miles on the oil. This oil saw 3,000 miles, and wear is lower. Much lower, actually, showing some excellent wear characteristics here. No contamination was found in the form of fuel, moisture, or coolant and while the viscosity was just a little low, that's not a serious concern since fuel wasn't to blame. Air and oil filtration look good. We're impressed by how good this engine looks! We'll look for more of the same next time. Nice report!"
Result / Average
Aluminum 3/4
Chromium 0/1
Iron 8/27
Copper 1/4
Lead 0/3
Tin 1/1
Moly 273/71
Nickel 0/1
Manganese 0/1
Silver 0/0
Titanium 0/0
Potassium 2/3
Boron 83/46
Silicon 10/12
Sodium 4/42
Calcium 2408/2064
Magnesium 8/140
Zinc 917/872
Barium 0/0
Phosphorus 759/730
Sus Vis @ 210 55.7 / 59-68
Cst vis @ 100 10.16 / 9.9-12.7
Flash 405 / >365
Fuel Antifreeze 0
Water 0
Insolubles 0.2
"Wear metals look great in this first sample from your Jeep. Universal averages show typical wear after about 4,100 miles on the oil. This oil saw 3,000 miles, and wear is lower. Much lower, actually, showing some excellent wear characteristics here. No contamination was found in the form of fuel, moisture, or coolant and while the viscosity was just a little low, that's not a serious concern since fuel wasn't to blame. Air and oil filtration look good. We're impressed by how good this engine looks! We'll look for more of the same next time. Nice report!"
Result / Average
Aluminum 3/4
Chromium 0/1
Iron 8/27
Copper 1/4
Lead 0/3
Tin 1/1
Moly 273/71
Nickel 0/1
Manganese 0/1
Silver 0/0
Titanium 0/0
Potassium 2/3
Boron 83/46
Silicon 10/12
Sodium 4/42
Calcium 2408/2064
Magnesium 8/140
Zinc 917/872
Barium 0/0
Phosphorus 759/730
Sus Vis @ 210 55.7 / 59-68
Cst vis @ 100 10.16 / 9.9-12.7
Flash 405 / >365
Fuel Antifreeze 0
Water 0
Insolubles 0.2
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