Yes changed to QSUD, but old oil smelled like black gasoline

[Speak2Mountain]

after 5,122 miles. Not just a faint smell but a strong strong smell.

I drive 70-80% highway and fast. I've left the oil in up 8K on previous OCI's and yesterday's old oil smelled exactly like it. 2 UOA's said 3 and 5% respectively (Blackstone). Oil does appear to be more watery on dipstick and sometimes oil is a little higher on dipstick and other times the car uses oil. So confusing.

Again this is a Lexus IS250 with 170k. This car was Toyota's first shot at DI. So I'm wondering out loud am I handling this oil thing the best I can?

Also, contemplating moving to a Euro 5w40 oil might help.

 

[jbutch]

What was the viscosity on the uoa?

3 to 5% fuel is pretty high and since it's a blackstone report, it's most likely even higher than that.

 

[PimTac]

Maybe it's not the oil. How about the injectors?

 

[Warstud]

What temp is it running? Maybe need to replace old 02 sensors

 

[LazyDog]

what about the PCV is it open or clean!

 

[csandste]

Like earlier posters I think it's something other than the oil. Correct the underlying problem, most oils are pretty much alike

 

[slug_bug]

You mentioned you previously did some longer OCI's. I'd never go more than 5k regardless of which oil you choose.

 

[Nickdfresh]

Originally Posted by PimTac
Maybe it's not the oil. How about the injectors?



+1 I would check the injectors first before worrying about weights...

 

[Mr Nice]

I won't worry. Keep using synthetic oil.

 

[Linctex]

Originally Posted by slug_bug
You mentioned you previously did some longer OCI's. I'd never go more than 5k regardless of which oil you choose.


That is just plain silliness, with no factual evidence to back it up

 

[Triple_Se7en]

I would cut this next OCI to 4K. Now that's really not silly at all. The evidence is in the smell.
Who wants bad fuel smell in their oil? No UOA evidence needed, when the smell is that bad.
If Linckie likes 3-5% fuel in his oil, then that's fine also. No thanks!

 

[tblt44]

How is the QSUD doing

 

[talest]

Originally Posted by Linctex
Originally Posted by slug_bug
You mentioned you previously did some longer OCI's. I'd never go more than 5k regardless of which oil you choose.


That is just plain silliness, with no factual evidence to back it up


Don't let the facts get in the way of a good story.

 

[Bryanccfshr]

Toyota has come up with some unique auto injector cleaning in recent models. This tells me they were solving a problem. You may have a fouled injector(s) . This is a mechanical issue that needs addressed at the source.

Take them out and do this or have someone else do it if you plan to keep the car.
https://www.injectorrx.com/fuel-inj...direct-injection-fuel-injector-cleaning/

 

[BillyE]

x2 on checking PCV function and engine temp.

 

[Speak2Mountain]

Running temp is within normal parameters, don't know about FI's. PCV is new.

 

[Speak2Mountain]

300 miles into QSUD, MPG has picked up every so slightly as has seat of pants acceleration.