*Notes sent in with my last sample*
Now a few questions:
1) I've used the same conventional oil since day one @ 81,xxx miles (Toyota 10w-30) without any additional additives.
Why would my report now show high levels of Titanium as an additive
The only contaminants I can think of is when I replaced the oil pump seal @ 18,796 miles into the interval, I sprayed some brake cleaner to clean the mating surface and used a little cocoa butter to hold the seal in place (didn't have any Vaseline or silicone grease on hand).
Neither of which contain Titanium
2) Towards the end of my interval, I noticed just a slight puff of blue smoke only after long periods of idling.
It never happened during initial start ups, so I don't think it's the valve seals
Has anyone here had this kind of smoke problem?
3) Now with fresh oil (actually about 3,xxx miles into the current interval), there's no smoke at all with zero leaks and no consumption, so I'm thinking whatever the problem is can be helped with either a thicker grade or high mileage oil
Any thoughts on this?
I guess I'm not ready to dive into the motor with a head job, especially since it's running perfectly without issue (on the original HG to boot!!)
Engine Make: Toyota (Original Engine)
Engine Model: 1FZ-FE 4.5L Inline 6
Fuel Type: Gasoline
Sample Date: 11/28/12
Mileage at previous interval: 290,102 miles
Mileage on this interval: 309, 123 miles
Mileage on oil: 19,021 miles
Oil Added between Interval: 5.5 Quarts (see note)
Oil Type: Toyota Brand 10w-30 Conventional Oil (bottled by Exxon/Mobil)
Remarks:
5 Quarts of make-up oil was added over time due to a leaky oil pump seal.
The Oil Pump seal was replaced at 18,796 miles and 1/2 Quart was added at this time.
I was advised to push my intervals to 12,000 miles based on my previous analysis, however, I pushed this interval a bit further because the oil still appeared to be golden on the dipstick (obviously due to the added oil).
1) Was the oil changed when sample was taken? (YES)
2) Are you interested in extended oil use? (YES)
3) Have you used any additives? (NO)
4) Would you like a TBN (Additional cost of $10.00) (YES)
Additional comments and Question:
Over the last few weeks of this interval, I've noticed a slight hint of blue smoke on acceleration, but only after the engine has been idling for more than 30 minutes.
I know prolonged idling is not advised, but is necessary in my line of work.
There's no smoke during cold starts or under normal use, only after extended idling and it immediately goes away.
Not sure if this has anything to do with internal issues or just the oil breaking down from all the mileage, but after changing to fresh oil (same type), I don't see anymore smoke, even after extended idling.
Because of this, would you suggest stepping up a grade and/or perhaps a high mileage oil?
I'm thinking about going with Mobil Super High Mileage 10w-40, but would like to hear your thoughts on this first.

Now a few questions:
1) I've used the same conventional oil since day one @ 81,xxx miles (Toyota 10w-30) without any additional additives.
Why would my report now show high levels of Titanium as an additive

The only contaminants I can think of is when I replaced the oil pump seal @ 18,796 miles into the interval, I sprayed some brake cleaner to clean the mating surface and used a little cocoa butter to hold the seal in place (didn't have any Vaseline or silicone grease on hand).
Neither of which contain Titanium

2) Towards the end of my interval, I noticed just a slight puff of blue smoke only after long periods of idling.
It never happened during initial start ups, so I don't think it's the valve seals

Has anyone here had this kind of smoke problem?
3) Now with fresh oil (actually about 3,xxx miles into the current interval), there's no smoke at all with zero leaks and no consumption, so I'm thinking whatever the problem is can be helped with either a thicker grade or high mileage oil

Any thoughts on this?
I guess I'm not ready to dive into the motor with a head job, especially since it's running perfectly without issue (on the original HG to boot!!)