Having using Lexus fullsyn (viscosity grade?) in your car now, I would suggest do some blotter spot tests (which are free anyway ..) from time to time and upload here for sharing with general readers for assessing the combined conditions of this Lexus oil AND engine condition , as a social project in Lowyat community.

Alphaz,
Will appreciate your sharing of this high mileage Aisin 5W30 blotter spot tests ....for everybody's knowledge and experience.

This post has been edited by zeng: Mar 2 2018, 03:37 PM

I have to stick with acea c3 minimum, because of diesel particulate filter is still fitted and twin turbo needs all protection it can get

I had just replaced about 700ml oil from the leftover in the bottle. So if I do the test it might not be accurate, but I'll do later anyway.

Where is the spare part shop exactly? excellent price you got there.....

Max Lee Tampoi. RM90 before GST.

My rule of thumb on used oil colour has been :-
a) goldenish hue colour indicates oil condition is fit for continuing service;
b) dark black colour does NOT indicate condemnation of used oils, unless with burnt smell.

12,000 km OCI should be easy for HGMO 0W20 in a 2014 Honda engine , I guess.

24 hour blot

Sorry to give you another boring and repetitively similar comments ......
that there is absence of center zone in this 11400 km blotter indicating high dispersancy capability of this oil sample .
Generally the other zones are not dark indicating low level of contaminants/combustion byproducts possibly due to cleaner ( Hyundai G4GB ) engine internal conditions and adequate quality of this Aisin 5W30.
If I were you, I would continue using this 11400 km oil and do another blotter spot test in 1500-2000 km and go from there.

This Aisin 5W30 , though 'unbranded' looks quite impressive so far.

This post has been edited by zeng: Mar 4 2018, 11:50 PM

That's great, I appreciate your comment. The engine is clean because it was totally overhauled last year, after overhauled I used cheap mineral oil for 1000km, then a mineral Penzzoil for 4000km, after that I changed to this Aisin synthetic. I was planning to change this Aisin at 10000km but since it's still good, I'll extend it to 13000km.

I also never heard of Aisin before, Google said it's a Japanese company that develops and produce "engine, drivetrain, body and chassis, aftermarket, and other main automotive parts for various major OEMs", and is 30% owned by Toyota. Can't find info on where they made their engine oil though.

If you are still having the container bottle, read the fine prints at the back, or upload picture on back of bottle, to see if it's made in Japan/Singapore/local ?

Sorry I got rid of it

Here's the photo after 51 hours :



This post has been edited by alphaz: Mar 5 2018, 10:36 PM

Sure enough , there is good news in absence of center zone indicating the oil's continuing serveceability.
However at outer most rings, there is some indication of fuel dilution ....... not sure if it's caused by sampling at cold temperatures, or having frequent short trips, or fuel injection matters though.

Yeah, it doesn't make sense to keep used empty engine oil bottle ..

This post has been edited by zeng: Mar 5 2018, 11:18 PM

maybe this one.

When I smelled the dipstick I did notice a faint petrol smell. The engine did run a bit rough for the past week, the air filter was dirty and the gearbox switch threw a Check Engine Light. I cleaned and reoil the air filter and adjusted the gearbox switch position and fixed the error code right before I took the sample. I'll run a test again and upload the results here.

Air fuel ratio is too rich.
Might be fuel system or driving pattern problem.

This post has been edited by zeng: Mar 8 2018, 11:10 AM

Thanks, chemistry.
This bottle has Japanese (market) in mind possibly, and it's barcode points to USA with an office in Singapore.
Couple with performance in this blotter spot test, it helps a little bit in my confidence level in its efficacy.

This post has been edited by zeng: Mar 12 2018, 01:45 PM

Quick question, sifus here use blotter tests to test their engine oil. Does that mean that your service interval is based on the blotter tests only or still following manufacturer's recommendation (mileage or duration)?

My brother is currently only doing around 400km a month for my brother's Camry, booklet says, every 6 months or 10k km. Can i stretch it to say, 1 year once servicing? Since, he is doing only 4800km a year.

Any advise is helpful

Where factory warranty issue is concerned, it's best to retain warranty rights by adhering to 'uncommon sense' factory recommendation of Oil Change Interval and 6 months/1 year duration.

For those out of warranty, one may stretch OCI's in km or goes beyond 1 year duration stipulation.
Other than uneconomically costly and impractical UOA's , I'd adopted free and easy Blotter spot tests to assess used oil conditions.........
realising along the way that factory recommendations are excessively conservative and short.

If the car is out of warranty , short answer is stretch it to say, 1 year or longer.
Long answer.

His car is out of warranty. Also, what are the critical stuff to change if it was once a year? Still follow the book?