I changed the oil in my 2012 Mazda 3 i GT Hatch last Saturday and sent a sample off to Blackstone for a UOA. My car is still very new (I've had it almost 11 months now) with only 6901 miles on the ODO at the time of the oil change. I changed out the factory fill at 3535 miles on June 5, 2012 and put in Mobil 1 0w20 AFE then. Last Saturday I put Pennzoil Platinum 0w20 in. I know it's kind of pointless to get a UOA on such a new car but I was mostly curious about the TBN since it's been over 5 months since I changed it. I drive mostly city/short frequent trips (mostly to work and school) so I don't put many miles on it. Mazda says to change the oil every 4 months or 5000 miles for severe driving (which I consider myself due to the short frequent trips). Here is my UOA result:
Comments:
DEREK: Some excess wear, silicon, and fuel dilution showed up in this sample. Most of the excess wear is
from normal wear-in since this engine is still so new, while silicon is likely from sealers used during
assembly and both should drop nicely next time. Universal averages show what normal wear looks like from
this type of engine after ~5,000 miles use on the oil. Your TBN was strong at 3.5, so lots of active additive
was left. The city driving you mentioned may or may not have caused the high fuel we found. We'll keep a
close eye on it next time. Check back in 5,000 miles again.
Code:
MI/HR on Oil 3,366
MI/HR on Unit 6,901
Sample Date 11/10/12
Make Up Oil Added 0 qts
ALUMINUM 7
CHROMIUM 1
IRON 12
COPPER 10
LEAD 0
TIN 6
MOLYBDENUM 180
NICKEL 0
MANGANESE 1
SILVER 0
TITANIUM 0
POTASSIUM 0
BORON 72
SILICON 20
SODIUM 0
CALCIUM 1121
MAGNESIUM 678
PHOSPHORUS 591
ZINC 733
BARIUM 2
SUS VIS @ 210° F 45.2
cSt VIS @ 100° C 5.80
Flashpoint °F 335
Fuel % 2.5
Antifreeze % 0.0
Water % 0.0
Insolubles % 0.3
TBN 3.5
Comments:
DEREK: Some excess wear, silicon, and fuel dilution showed up in this sample. Most of the excess wear is
from normal wear-in since this engine is still so new, while silicon is likely from sealers used during
assembly and both should drop nicely next time. Universal averages show what normal wear looks like from
this type of engine after ~5,000 miles use on the oil. Your TBN was strong at 3.5, so lots of active additive
was left. The city driving you mentioned may or may not have caused the high fuel we found. We'll keep a
close eye on it next time. Check back in 5,000 miles again.
Code:
MI/HR on Oil 3,366
MI/HR on Unit 6,901
Sample Date 11/10/12
Make Up Oil Added 0 qts
ALUMINUM 7
CHROMIUM 1
IRON 12
COPPER 10
LEAD 0
TIN 6
MOLYBDENUM 180
NICKEL 0
MANGANESE 1
SILVER 0
TITANIUM 0
POTASSIUM 0
BORON 72
SILICON 20
SODIUM 0
CALCIUM 1121
MAGNESIUM 678
PHOSPHORUS 591
ZINC 733
BARIUM 2
SUS VIS @ 210° F 45.2
cSt VIS @ 100° C 5.80
Flashpoint °F 335
Fuel % 2.5
Antifreeze % 0.0
Water % 0.0
Insolubles % 0.3
TBN 3.5
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