This is my first new car, I've tried to be as on top of my oil change and maintenance as possible (Subaru WRX 2014). Doing UOA's to keep track of how my engine is performing. UOA Done by Blackstone on my second oil change (first oil change was at 3,000 mi, second was at 7,500 mi as per Subaru recommendations). Am running Pennzoil Ultra 5W/30 with the blue Subaru OEM filter; daily driver with some aggressive driving on occasion.
Comments from Blackstone:
MI on Oil 4,500 MI on Unit 7,500 Sample Date 07/23/14 Make Up Oil Added 0 qt Oil Type PENNZOIL ULTRA 5W/30 Universal Avgs ALUMINUM 7 4 CHROMIUM 1 1 IRON 15 9 COPPER 7 9 LEAD 0 3 TIN 3 1 MOLYBDENUM 170 73 NICKEL 1 0 MANGANESE 1 2 SILVER 1 0 TITANIUM 2 1 POTASSIUM 0 2 BORON 87 45 SILICON 16 10 SODIUM 6 30 CALCIUM 2342 1908 MAGNESIUM 19 423 PHOSPHORUS 774 831 ZINC 865 982 BARIUM 0 0 SUS Viscosity @ 210°F 55.3 cSt Viscosity @ 100°C 8.85 Flashpoint in °F 375 Fuel % <0.5 Antifreeze % 0.0 Water % 0.0 Insolubles 0.3 TBN TAN ISO CODE
What are your thoughts/comments? I plan on doing the next oil change at 15k miles. -Jeff
The only thing reading out of line in this sample was silicon, but that's a pretty common find in new engines. It's just residual from seals used when the engine was assembled, and it usually takes two or three oil changes for all of the residual silicon to wash out completely. That might also be why our metals are just a little high compared to averages, from wear-in of new parts. Universal averages are based on ~3,900 miles of oil use, so your metals really aren't bad on a longer oil run, but you may see some improvements next time. All in all, a very nice report here!