2000 LX470, 2UZ-FE, 200k mi; Mobil 1 5w-30 6k mi

[HDoilDude]

New-to-me 2000 Lexus LX-470 with the solid 2UZ-FE motor. Bought from 2nd owner, had many receipts, including timing belt and all of the baselining items one does (including water pimp/timing belt!) all done within the last year.

But as it's assuming my daily/fam duties, I also baselined most fluids/filters/tires/brakes on purchase (even had the steering rack replaced, oh joy...) and decided to send an oil sample to Blackstone, as the previous owner's records showed it was due (~6k miles/6mos of use) and I have a few bulk samples remaining.

Changed with synthetic Delo 5w-40 (SN) I had on hand plus an OEM Lexus (Toyota) filter, since it's summertime in the mid-Atlantic and the manual allows for the 5w-40.

Out of all the dozens and dozens of used oil samples I've run across many platforms, both gas and diesel, the only one showing any concern from Blackstone's report was this unit.

Just a bit annoyed with the results. Doesn't seem wildly high but just high enough to inject a bit of doubt into my (at times, OCD) brain.

Asked the previous owner what oil they used and he insisted it was Mobil1 5w-30... yet the only written record I see shows (alarmingly) just 5qts of 5w20 Quaker State from a local Toyota dealer back in November 2024.

Thoughts?

All I can really do is continue to monitor/sample and hope the baseline I've done (including air filter, thank you Blackstone...) is enough to bring the numbers back down into "normal" range.

For what it's worth, the slightly denser 5w-40 has hushed up a little valvetrain ticking I noticed with the PO's oil.

 

[Patrick0525]

New-to-me 2000 Lexus LX-470 with the solid 2UZ-FE motor. Bought from 2nd owner, had many receipts, including timing belt and all of the baselining items one does (including water pimp/timing belt!) all done within the last year.

But as it's assuming my daily/fam duties, I also baselined most fluids/filters/tires/brakes on purchase (even had the steering rack replaced, oh joy...) and decided to send an oil sample to Blackstone, as the previous owner's records showed it was due (~6k miles/6mos of use) and I have a few bulk samples remaining.

Changed with synthetic Delo 5w-40 (SN) I had on hand plus an OEM Lexus (Toyota) filter, since it's summertime in the mid-Atlantic and the manual allows for the 5w-40.

Out of all the dozens and dozens of used oil samples I've run across many platforms, both gas and diesel, the only one showing any concern from Blackstone's report was this unit.

Just a bit annoyed with the results. Doesn't seem wildly high but just high enough to inject a bit of doubt into my (at times, OCD) brain.

Asked the previous owner what oil they used and he insisted it was Mobil1 5w-30... yet the only written record I see shows (alarmingly) just 5qts of 5w20 Quaker State from a local Toyota dealer back in November 2024.

Thoughts?

All I can really do is continue to monitor/sample and hope the baseline I've done (including air filter, thank you Blackstone...) is enough to bring the numbers back down into "normal" range.

For what it's worth, the slightly denser 5w-40 has hushed up a little valvetrain ticking I noticed with the PO's oil.

View attachment 287843

Yikes on the double digit ppm Cu, Fe, Na and K.
They should be < 5 ppm for Toyota engines.

Someone earlier posted a Toyota pink coolant analysis and the K was 7600 ppm which is a massive number under pressure trying to breach the head gasket into ur oil.

 

[JavierH19]

Looks like a 5w-20 with the kv40/100. One run likely wasn't the worst thing ever but who knows if it was ran on 20 grade more than once. Definitely use 40 grade.

 

[AKhan87]

Why not use a Euro oil in the 0/5w40 flavor?

why are you using a diesel oil? it is not designed for a gasoline engine. Just because other people do it, and nothing ever happened, doesn't mean it is the best option.

 

[cheesepuffs2]

Why not use a Euro oil in the 0/5w40 flavor?

why are you using a diesel oil? it is not designed for a gasoline engine. Just because other people do it, and nothing ever happened, doesn't mean it is the best option.

I agree, and even though OP stated that this Delo is SN (implying it's dual rated) I've never understood the deal with running a diesel oil in a gas engine except for oils that have shown to be pretty phenomenal overall like Mobil ESP.

I'm with you, if this were my engine and assuming it doesn't burn oil, I'd switch to Mobil 1 0W-40 or 5W-40 FS.

 

[JavierH19]

Why not use a Euro oil in the 0/5w40 flavor?

why are you using a diesel oil? it is not designed for a gasoline engine. Just because other people do it, and nothing ever happened, doesn't mean it is the best option.

Just wait until you find out that many HDEO's are dual rated like Delo and what euro 30/40's are also used in

This is very close to a euro if not lesser in terms of detergents and additives

 

[HDoilDude]

Yeah no signs of burning oil to date.

I'll give 5w40 in another flavor a shot next time, some sort of High Mileage variety.

Like has been said, it's dual rated and the correct viscosity. Per the API, there's no technical reason it can't be used in a low output gas engine that falls within the viscosity specs.

From what I've read and viewed on this platform, it's not too picky as long as the viscosity is within spec.

Appreciate all the input.

 

[cheesepuffs2]

^ Can we stop posting basic oil analysis sheets as if they accurately portray every additive in a given oil yet?

 

[cheesepuffs2]

Yeah no signs of burning oil to date.

I'll give 5w40 in another flavor a shot next time, some sort of High Mileage variety.

Like has been said, it's dual rated and the correct viscosity. Per the API, there's no technical reason it can't be used in a low output gas engine that falls within the viscosity specs.

From what I've read and viewed on this platform, it's not too picky as long as the viscosity is within spec.

Appreciate all the input.

Going to be hard to find any 5W-40 in a high mileage variant, but I'd imagine Mobil 1 10W-40 HM would be a good start.

 

[HDoilDude]

Just wait until you find out that many HDEO's are dual rated like Delo and what euro 30/40's are also used in

This is very close to a euro if not lesser in terms of detergents and additives

View attachment 287846

View attachment 287849

Yeah, I definitely considered the lack of moly.

I might dump it early in favor of M1 0w/5w-40 SP, just for the added moly.

 

[JavierH19]

^ Can we stop posting basic oil analysis sheets as if they accurately portray every additive in a given oil yet?

We can once people stop saying how an hdeo can't be used in a gas engine because it has too many additives and to use a euro oil instead when both are very likely to be identical and in this case delo is more of a gas formulation than a euro oil and would be lspi safe if that was a concern which isn't.

 

[HDoilDude]

Going to be hard to find any 5W-40 in a high mileage variant, but I'd imagine Mobil 1 10W-40 HM would be a good start.

True, I have no qualms going back to the what's-on-the-cap viscosity of 5w-30, with the HM additives to boot.

 

[JavierH19]

Yeah, I definitely considered the lack of moly.

I might dump it early in favor of M1 0w/5w-40 SP, just for the added moly.

The moly is nice but xsp 5w-40 has the highest hths I've seen for an off the shelf 5w-40 hdeo or euro being 4.2. That 0w-40 will be lower but not like it'll matter it's still plenty. Engine is fine with both.

 

[cheesepuffs2]

We can once people stop saying how an hdeo can't be used in a gas engine because it has too many additives and to use a euro oil instead when both are very likely to be identical and in this case delo is more of a gas formulation than a euro oil and would be lspi safe if that was a concern which isn't.

Who said anything about "too many additives"? It's common knowledge around here that ZDDP and phosphorus levels in the current crop of diesels oils have been reduced compared to years past. That was the whole draw to people using Rotella in gas engines before (for those who subscribed to that) was that it had higher zinc content than gasoline oils of the period. Now there's no draw at all.

 

[HDoilDude]

I didn't even notice the moly was at 223.

That seems high, no? For either Mobil1 or the dino Quaker from the Toyota invoice.

Maybe he added it to try and quiet some noise or as preventive maintenance/his own baseline?

Well, now I've got data moving forward, anyways... hah!

 

[Oliveoil2]

Looks like a possible head gasket issue. Probably not oil related. As mention earlier, look at the sodium and potassium.

 

[dnewton3]

It's far too early to make a conclusion. More info is needed and you need to calm the waters, as it were. Despite the POs assertion, you really have no idea what was put in there; oils and even additives can be misleading when unknown. The wear isn't what's concerning; it's the Si and potential coolant.

Run a few short 3k OCIs and don't UOA. Try to normalize the lube and engine. I would recommend an inexpensive syn; ST or some other house brand, in 5w-30.

Then run 5k miles on same, and take another UOA.

 

[cptbarkey]

Who said anything about "too many additives"? It's common knowledge around here that ZDDP and phosphorus levels in the current crop of diesels oils have been reduced compared to years past. That was the whole draw to people using Rotella in gas engines before (for those who subscribed to that) was that it had higher zinc content than gasoline oils of the period. Now there's no draw at all.

And how many diesel engines have exploded due to CK-4?

*crickets*

They have exploded due to emissions over-engineering.

 

[cheesepuffs2]

And how many diesel engines have exploded due to CK-4?

*crickets*

They have exploded due to emissions over-engineering.

This isn't a debate about diesel oils versus diesel emissions equipment.

 

[Toy4x4]

I have the '07 version of this engine and have been using M1 0w-40 FS since I got it in '13. UOA's have been great (haven't done one in a while due to life events), so it's what I'd recommend.