vehicle-----------------05 Toyota Tacoma, 4.0L, 6 cyl
OIL---------------------Amsoil SSO 0w-30
oil additive------------3 ounces Auto-RX & recently, 4 oz LC20 over last 1600 miles
Make up oil-----------none
Engine oil capacity---5.5 quarts
oil filter----------------Amsoil EAO57
air filter----------------Amsoil EAA
miles on oil------------8082 (apprx 19 months--5/9/08 thru 12/18/09)
Miles on filter---------9,237 (25 months)
miles on vehicle--------32,093
UOA by Oil Analyzers: Data flagged for observation only; Total Base Number is MODERATELY LOW; Oil is suitable for continued use. Re-sample in 3,500 miles or 65 hours.
Overall severity of report--------2 (abnormal)
LAB COMMENTS:
WEAR METALS in PPM:
iron--------------------11
chromium-------------0
nickel------------------1
aluminum-------------2
copper-----------------2
lead--------------------2
tin----------------------0
cadmium--------------0
silver-------------------0
vanadium-------------0
CONTAMINANT METALS:
silicon-----------------12
sodium----------------6
potassium-------------1
MULTI-SOURCE METALS:
titanium---------------0
molybdenum---------4
Antimony-------------0
Manganese-----------0
Lithium---------------0
boron------------------11
ADDITIVE METALS:
magnesium-----------14
calcium----------------3145
barium-----------------1
phosphorus------------601
zinc---------------------712
Lube change-----------no
Lube filter change----no
fuel---------------------1.4%
Soot Water visc40------------------n/a
visc100----------------9.7
TAN--------------------n/a
TBN--------------------3.71
oxidation--------------39
nitration---------------29
NOTES/COMMENTS:
Fuel dilution is only issue I see. None noted in previous samples. Sample was taken almost immediately after apprx 55 mile mostly highway trip. Only change in driving style is warm up time of around 2+ minutes as opposed to previous 20-30 seconds max. Getting best winter mpg to date--around 24 mpg with winter blend premium gas (truck EPA rated 17-21 mpg). Plugs changed appx 3,000 miles ago to Denso long life Iridium. Aprx 65/35 highway/city driving using mostly feather foot. As with prior samples w/no fuel dilution, this sample includes many short 11 mile trips.
Compared to previous samples, PPPM of lead up, copper down, aluminum down, silicon down.
LC20 recently added due to expected thickening w/Auto-RX & 100% synthetic oil combo. Apparently thickening is a non-issue in this instance.
Plan to change oil/filter in 1-2 years, then SSO. Don’t know if I’ll use Auto-RX or LC20 next change. Don’t plan to continue mixing additives.
PREVIOUS UOA’s:
http://www.bobistheoilguy.com/forums/ubb...rue#Post1028981
OIL---------------------Amsoil SSO 0w-30
oil additive------------3 ounces Auto-RX & recently, 4 oz LC20 over last 1600 miles
Make up oil-----------none
Engine oil capacity---5.5 quarts
oil filter----------------Amsoil EAO57
air filter----------------Amsoil EAA
miles on oil------------8082 (apprx 19 months--5/9/08 thru 12/18/09)
Miles on filter---------9,237 (25 months)
miles on vehicle--------32,093
UOA by Oil Analyzers: Data flagged for observation only; Total Base Number is MODERATELY LOW; Oil is suitable for continued use. Re-sample in 3,500 miles or 65 hours.
Overall severity of report--------2 (abnormal)
LAB COMMENTS:
WEAR METALS in PPM:
iron--------------------11
chromium-------------0
nickel------------------1
aluminum-------------2
copper-----------------2
lead--------------------2
tin----------------------0
cadmium--------------0
silver-------------------0
vanadium-------------0
CONTAMINANT METALS:
silicon-----------------12
sodium----------------6
potassium-------------1
MULTI-SOURCE METALS:
titanium---------------0
molybdenum---------4
Antimony-------------0
Manganese-----------0
Lithium---------------0
boron------------------11
ADDITIVE METALS:
magnesium-----------14
calcium----------------3145
barium-----------------1
phosphorus------------601
zinc---------------------712
Lube change-----------no
Lube filter change----no
fuel---------------------1.4%
Soot Water visc40------------------n/a
visc100----------------9.7
TAN--------------------n/a
TBN--------------------3.71
oxidation--------------39
nitration---------------29
NOTES/COMMENTS:
Fuel dilution is only issue I see. None noted in previous samples. Sample was taken almost immediately after apprx 55 mile mostly highway trip. Only change in driving style is warm up time of around 2+ minutes as opposed to previous 20-30 seconds max. Getting best winter mpg to date--around 24 mpg with winter blend premium gas (truck EPA rated 17-21 mpg). Plugs changed appx 3,000 miles ago to Denso long life Iridium. Aprx 65/35 highway/city driving using mostly feather foot. As with prior samples w/no fuel dilution, this sample includes many short 11 mile trips.
Compared to previous samples, PPPM of lead up, copper down, aluminum down, silicon down.
LC20 recently added due to expected thickening w/Auto-RX & 100% synthetic oil combo. Apparently thickening is a non-issue in this instance.
Plan to change oil/filter in 1-2 years, then SSO. Don’t know if I’ll use Auto-RX or LC20 next change. Don’t plan to continue mixing additives.
PREVIOUS UOA’s:
http://www.bobistheoilguy.com/forums/ubb...rue#Post1028981