2008 Pontiac Grand Prix, Mobil 1 EP 5w-30, Mobil one Filter, 12,921 miles on oil; 53,616 on vehicle. 0 make up oil. I have 5w-30 edge in the engine right now as it was cheaper than dirt at wallyworld, so my next sample will be roughly the same mileage with that. I really didnt extend the interval past the Oil Life Monitor, as the OLM still had roughly 2% left at the time of the oil change. Not sure what to think about the iron and copper...
Sample - Averages
ALUMINUM - 4 - 3
CHROMIUM - 1 - 1
IRON - 32 - 13
COPPER - 52 - 17
LEAD - 2 - 8
TIN - 1 - 1
MOLYBDENUM - 91 - 64
NICKEL - 1 - 0
MANGANEESE - 1 - 0
SILVER - 0 - 0
TITANIUM - 0 - 0
POTASSIUM - 3 - 7
BORON - 59 - 45
SILICON - 15 - 11
SODIUM - 16 - 23
CALCIUM - 2295 - 2076
MAGNESIUM - 12 - 89
PHOSPHORUS - 618 - 691
ZINC - 831 - 849
BARIUM - 0 - 0
SUS Viscosity @ 210°F - 62 - 56 to 63
cSt Viscosity @ 100°C - 10.77 - 9.1 to 11.3
Flashpoint in °F - 410 - >365
Fuel % - Antifreez e % - 0.0 - 0
Water % - 0.0 - 0
Insolubles % - 0.3 - TBN - 3.0 -
CHRIS: Iron and copper read high in this initial sample from your Grand Prix. This is not entirely
unexpected, since you ran the oil almost 13,000 miles. We base universal averages on only 4,700 miles.
Iron is probably okay, though copper doesn't usually increase like this on a longer oil change. This oil is
abrasive, and the oil itself may have caused excess wear at brass/bronze parts (copper). We see that you
are interested in longer oil changes, but we would not suggest it just yet, even though the TBN shows plenty
of active additive left. Try 8K-10K miles & check back to monitor.
Sample - Averages
ALUMINUM - 4 - 3
CHROMIUM - 1 - 1
IRON - 32 - 13
COPPER - 52 - 17
LEAD - 2 - 8
TIN - 1 - 1
MOLYBDENUM - 91 - 64
NICKEL - 1 - 0
MANGANEESE - 1 - 0
SILVER - 0 - 0
TITANIUM - 0 - 0
POTASSIUM - 3 - 7
BORON - 59 - 45
SILICON - 15 - 11
SODIUM - 16 - 23
CALCIUM - 2295 - 2076
MAGNESIUM - 12 - 89
PHOSPHORUS - 618 - 691
ZINC - 831 - 849
BARIUM - 0 - 0
SUS Viscosity @ 210°F - 62 - 56 to 63
cSt Viscosity @ 100°C - 10.77 - 9.1 to 11.3
Flashpoint in °F - 410 - >365
Fuel % - Antifreez e % - 0.0 - 0
Water % - 0.0 - 0
Insolubles % - 0.3 - TBN - 3.0 -
CHRIS: Iron and copper read high in this initial sample from your Grand Prix. This is not entirely
unexpected, since you ran the oil almost 13,000 miles. We base universal averages on only 4,700 miles.
Iron is probably okay, though copper doesn't usually increase like this on a longer oil change. This oil is
abrasive, and the oil itself may have caused excess wear at brass/bronze parts (copper). We see that you
are interested in longer oil changes, but we would not suggest it just yet, even though the TBN shows plenty
of active additive left. Try 8K-10K miles & check back to monitor.
Last edited: