First time I used Amsoil 0w-30 for 15k. JARED: This second sample out of your Prius looks really good. The metals that were high last time have improved here. They were just left over from the break-in period. You've kept this oil in place 10,000 miles and wear is a little higher than average, but everything is properly balanced. You could try 12,000 miles next oil change. The oil's TBN read 3.3, so there's still active additive remaining for a longer oil change. No fuel found at all, compared to the 3.0% we found last time. No other contaminants found, either. This Prius is in very good shape. No problems found. Miles on oil 10,000 Miles on Unit 27,000 Sample Date 4/09/09 Make-up oil 0 FilterPurolator Pure One ALUMINUM 5 CHROMIUM 0 IRON 14 COPPER 2 LEAD 0 TIN 1 MOLYBDENUM 41 NICKEL 0 MANGANESE 1 SILVER 0 TITANIUM 0 POTASSIUM 2 BORON 24 SILICON 27 SODIUM 6 CALCIUM 2863 MAGNESIUM 13 PHOSPHORUS 619 ZINC 732 BARIUM 0 SUS Viscosity @ 210°F 57.7 cSt Viscosity @ 100°C 9.55 Flashpoint in °F 370 Fuel % 0.5 Antifreeze % Water % Insolubles % 0.3 TBN 3.3 ISO Code
Here is the first one: Blackstone Labs. Miles on unit:17k Miles on oil:15k Make-up oil: .5 quarts. You've run this oil for about 88% of this young engine's life, and that's the reason that we are still finding high iron, copper, and silicon. We normally expect wear-in to be past by the time you get to about 10,000 miles, but when you run long oil changes from the start, the process takes longer. You'll get there eventually, though you could speed the process along by changing the oil at 7,500 miles next time. Note fuel at 3.0%. This is more than we like to see but hopefully it's from rings seating. The TBN read 4.1 showing some active additive left. Check back. ALUMINUM 5 CHROMIUM 0 IRON 18 COPPER 9 LEAD 1 TIN 11 MOLYBDENUM 1 MANGANESE 1 NICKEL 1 SILVER 0 TITANIUM 0 POTASSIUM 3 BORON 5 SILICON 58 SODIUM 6 CALCIUM 3206 MAGNESIUM 11 PHOSPHORUS 594 ZINC 711 BARIUM 1 cSt Viscosity @ 100°C 8.85 SUS Viscosity @ 210°F 55.3 Flashpoint in °F 315 Fuel % 3.0 Antifreeze % 0 Insolubles 0.3 A TBN that high with 3% fuel is outstanding after 15k.
