First UOA for my GXP the OCI has been 10 months
analysis from Blackstone
mile on oil 4,393
Mi on car 28,488
sample date 3-28-12
Make up oil 0
/ avg
alu 1 /2
chr 0 /1
iron 4 /11
cop 9 /16
lead 0 /5
tin 3 /1
moly 21 /68
nick 0 /1
mang 1 /0
sil 0 /0
titanm 21 /0
pot 4 /2
boron 12 /49
silicon 4 /9
sod 277 /35
cal 1437 /2038
magnes 40 /174
phos 601 /724
zinc 783 /856
barium 0 /0
SUS vis 55.5
cST vis 8.92
flash 385
fuel antifrz 0
water 0
insol 0.2
I had two free oil changes from a dealer so I had them change both my 05 Bonne GXP 4.6L V8 and my 08 Impala SS LS4 5.3L V8 at the same time. Dealer said oil was GM Goodwrench 5W-30. The GXP used no oil the dipstick showed just a hair below filled. But my Impala SS with 38K miles, has been using increasingly more oil and this last OCI it used 3 quarts over 4270 miles. My GXP is my replacement for the Impala SS and the SS will be sold.
per Blackstone
We're not sure what kind of oil GM is using theses days , but it looks like it uses both titanium and sodium as additives. given the great wear numbers here, the oil - whatever it is - is working just fine for your Bonneville. Universal averges show normal wear after about 4,600 miles on the oil. Your oil run wasn't quite as long though metals all read extremely low. this oil is still in great shape, the vis was in the 5w-30 range, and no fuel, water,coolant, or dirt was found. this oil is so clean, you could have sold it to your neighbors! Run 5,000 miles next time.
analysis from Blackstone
mile on oil 4,393
Mi on car 28,488
sample date 3-28-12
Make up oil 0
/ avg
alu 1 /2
chr 0 /1
iron 4 /11
cop 9 /16
lead 0 /5
tin 3 /1
moly 21 /68
nick 0 /1
mang 1 /0
sil 0 /0
titanm 21 /0
pot 4 /2
boron 12 /49
silicon 4 /9
sod 277 /35
cal 1437 /2038
magnes 40 /174
phos 601 /724
zinc 783 /856
barium 0 /0
SUS vis 55.5
cST vis 8.92
flash 385
fuel antifrz 0
water 0
insol 0.2
I had two free oil changes from a dealer so I had them change both my 05 Bonne GXP 4.6L V8 and my 08 Impala SS LS4 5.3L V8 at the same time. Dealer said oil was GM Goodwrench 5W-30. The GXP used no oil the dipstick showed just a hair below filled. But my Impala SS with 38K miles, has been using increasingly more oil and this last OCI it used 3 quarts over 4270 miles. My GXP is my replacement for the Impala SS and the SS will be sold.
per Blackstone
We're not sure what kind of oil GM is using theses days , but it looks like it uses both titanium and sodium as additives. given the great wear numbers here, the oil - whatever it is - is working just fine for your Bonneville. Universal averges show normal wear after about 4,600 miles on the oil. Your oil run wasn't quite as long though metals all read extremely low. this oil is still in great shape, the vis was in the 5w-30 range, and no fuel, water,coolant, or dirt was found. this oil is so clean, you could have sold it to your neighbors! Run 5,000 miles next time.