This is from the third oil change in the corolla. It is a 2007 and is toyota allows the use of 5w20. I got the PP almost as cheap as the GTX and am doing the UOA because I couldn't find any for PP 5w20 and this engine. I also do a lot of short trips. My work commute for this interval was very little highway miles and short trips. I also used a 2 oz maint. dose of Auto-RX for grins. Oil filter was the white oversized purolator. First UOA is toyota dealer bulk 5w30. Looks like it is trending down with wear-in. Filled up with mover 5w20 PP and maint. dose of A-RX. Might leave out the A-RX next time and see what the UOA says. Wish Toyota warranty allowed 10k miles. Looks like this combo wouldn't have any trouble at 10K intervals.
Blackstone comments:
Your Toyota’s engine is getting closer to reaching maturity, which usually occurs around 10,000
miles. Yours may take a little longer but it will get there. Copper is usually the last wear metal to read
average because of the way bronze parts are machined at the factory. The rest of the wear metals are
already low. Silicon and sodium both improved and should read normally in your next oil sample. The TBN
was 4.3, lots of active additive left. No gas, moisture or coolant was present in the sample. Look for more
improvements in your next sample.
MI/HR on Oil------4910-----3920
MI/HR on Unit-----9867-----4957
Sample Date-------11/3/07--7/5/07
Make up Oil-------0--------0
ALUMINUM----------3--------3
CHROMIUM----------0--------0
IRON--------------8--------9
COPPER------------11-------31
LEAD--------------2--------1
TIN---------------1--------4
MOLY--------------53-------115
NICKEL------------0--------0
MANGANESE---------1--------1
SILVER------------0--------0
TITANIUM----------0--------0
POTASSIUM---------1--------4
BORON-------------24-------40
SILICON-----------18-------53
SODIUM------------32-------248
CALCIUM-----------2556-----1436
MAGNESIUM---------16-------8
PHOSPHORUS--------664------585
ZINC--------------777------736
BARIUM------------0--------2
SUS VISC. @ 210F--52.5-----52.7
cST VISC. @ 100C--8.03-----8.10
FLASHPOINT F------385------385
FUEL %------------ ANTIFREEZE %------?-------0.0
WATER-------------0.0-----0.0
INSOLUBLES--------0.1-----0.2
TBN---------------4.3-----2.9
Blackstone comments:
Your Toyota’s engine is getting closer to reaching maturity, which usually occurs around 10,000
miles. Yours may take a little longer but it will get there. Copper is usually the last wear metal to read
average because of the way bronze parts are machined at the factory. The rest of the wear metals are
already low. Silicon and sodium both improved and should read normally in your next oil sample. The TBN
was 4.3, lots of active additive left. No gas, moisture or coolant was present in the sample. Look for more
improvements in your next sample.
MI/HR on Oil------4910-----3920
MI/HR on Unit-----9867-----4957
Sample Date-------11/3/07--7/5/07
Make up Oil-------0--------0
ALUMINUM----------3--------3
CHROMIUM----------0--------0
IRON--------------8--------9
COPPER------------11-------31
LEAD--------------2--------1
TIN---------------1--------4
MOLY--------------53-------115
NICKEL------------0--------0
MANGANESE---------1--------1
SILVER------------0--------0
TITANIUM----------0--------0
POTASSIUM---------1--------4
BORON-------------24-------40
SILICON-----------18-------53
SODIUM------------32-------248
CALCIUM-----------2556-----1436
MAGNESIUM---------16-------8
PHOSPHORUS--------664------585
ZINC--------------777------736
BARIUM------------0--------2
SUS VISC. @ 210F--52.5-----52.7
cST VISC. @ 100C--8.03-----8.10
FLASHPOINT F------385------385
FUEL %------------ ANTIFREEZE %------?-------0.0
WATER-------------0.0-----0.0
INSOLUBLES--------0.1-----0.2
TBN---------------4.3-----2.9