Backstory: we bought this 4x4 Toyota Sequoia SR5 almost 2 years ago with 194K miles, It was owned by a company that repaired x-ray machines, they drove it a lot but it appeared to only have a driver inside, interior was immaculate. and had no wear accept for the drivers seat and the very back where machine were loaded in and out. the miles hurt its resale value and we got it for a song.
last winter we moved 2,700 miles, and it towed a 11,000# enclosed trailer (rated for 7,000#) that was the previous OCI that was also PUP 10w-30, vehicle calls for 0w-20.
On very cold starts I get a brief momentary light knocking noise, it was almost never heard in the sourthern climate we came from, I was afraid there might be a bearing issue, and I switched at this OCI to PUP 0w-20 for the winter, that seams to have lowered the temp this noise appears and shortened it, so I am thinking 0w-20 is correct for a 45th latitude winter, given the excellent wear numbers in this report I am guessing the knock is something like the timing chain slap until oil pressure comes up and actuates the chain tensioner. (hopefully!) vehicle operates mostly in the Colombia basin and surrounding mountains, its high/cold desert, in the last year we have seen from -16 to 117 Fahrenheit. though most days are far more temperate, fairly dry climate so moisture is not much of a concern. my daily commute is only a few miles and it does not fully come up to temperature, but we are far from most stores and at least every few weeks at the longest, it goes into town for shopping and gets fully up to temp sometimes for hours depending on where we need to go to.
Blackstone:
So obviously I am quite happy with this report, even the already low silicon turns out to be from the oil, curious where the titanium came from?, are there titanium parts in the 3UR-FE? this is actually a 3UR-FBE its slightly diffrenct to accept E-85 "flex-fuel" that I do not use. i think the diffrences are mainly in the fuel system and engine management. other question is the loss of boron, that may be a 10w-30 / 5w-30 difference? or possiby reformulation? or was it consumed?
last winter we moved 2,700 miles, and it towed a 11,000# enclosed trailer (rated for 7,000#) that was the previous OCI that was also PUP 10w-30, vehicle calls for 0w-20.
On very cold starts I get a brief momentary light knocking noise, it was almost never heard in the sourthern climate we came from, I was afraid there might be a bearing issue, and I switched at this OCI to PUP 0w-20 for the winter, that seams to have lowered the temp this noise appears and shortened it, so I am thinking 0w-20 is correct for a 45th latitude winter, given the excellent wear numbers in this report I am guessing the knock is something like the timing chain slap until oil pressure comes up and actuates the chain tensioner. (hopefully!) vehicle operates mostly in the Colombia basin and surrounding mountains, its high/cold desert, in the last year we have seen from -16 to 117 Fahrenheit. though most days are far more temperate, fairly dry climate so moisture is not much of a concern. my daily commute is only a few miles and it does not fully come up to temperature, but we are far from most stores and at least every few weeks at the longest, it goes into town for shopping and gets fully up to temp sometimes for hours depending on where we need to go to.
Blackstone:
Code:
: We read your notes about the heavy towing and intermittent knock. We're pleased to say, then,
that looks good in its first round of testing. The wear metals all look great compared to the universal
averages, which are based on the 5.7L Toyota engine after 6,500-mile intervals. If the noise you're hearing
is causing any excess wear, it certainly isn't apparent here. There isn't any contamination from fuel dilution,
water, or coolant to contend with and we do think you'd be fine to try longer intervals (assuming the noise
doesn't worsen). Try 7,000 miles.
miles on oil: 4,981
miles on unit: 218,294
sample date: 11/16/2021
0qts make up oil
universal
average PUP VOA (5w-30 i could not find a 10w-30)
ALUMINUM 2 3 0
CHROMIUM 0 0 0
IRON 5 8 0
COPPER 0 2 0
LEAD 0 0 0
TIN 0 0 0
MOLYBDENUM 83 105 89
NICKEL 0 0 0
MANGANESE 0 1 0
SILVER 0 0 0
TITANIUM 2 3 0
POTASSIUM 1 2 0
BORON 58 46 251
SILICON 6 16 6
SODIUM 5 29 2
CALCIUM 1,053 1,599 1,080
MAGNESIUM 752 445 758
PHOSPHORUS 626 674 694
ZINC 713 776 753
BARIUM 0 0 0
PUP VOA (5w-30 i could not find a 10w-30)
cSt Viscosity @ 100°C 58.7 58.3
SUS Viscosity @ 210°F 9.84 9.72
Flashpoint in °F 430 450
Fuel % 0 0
Water % 0 0
Antifreeze % 0 0
Insolubles % 0.2 0.0
TBN N/A 8.1So obviously I am quite happy with this report, even the already low silicon turns out to be from the oil, curious where the titanium came from?, are there titanium parts in the 3UR-FE? this is actually a 3UR-FBE its slightly diffrenct to accept E-85 "flex-fuel" that I do not use. i think the diffrences are mainly in the fuel system and engine management. other question is the loss of boron, that may be a 10w-30 / 5w-30 difference? or possiby reformulation? or was it consumed?
That did turn out to be a very happy arrangement!