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Just curious about their findings if they don't do GC tests.

Interesting read received today "Is Fuel Dilution Just a Hybrid Thing?". That's why I personally favor the 5k OCI, even if it doesn't meet the special operation conditions. From BlackStone Labs...

Thank you very much for the detailed explanation! So basically when the ICE is off (EV Mode) the system is open keeping the stationary oil hot (160F). Then when the ICE is working the system closes so the flowing oil does not get hotter; and since it's flowing mixing with colder oil thus the...

That make sense. ^ It took me by surprise. I was expecting the opposite, higher when throttling, lower when idling/Ev.

Yes, Exactly like that!

Today out of curiosity I decided to monitor the oil temp on a 25mi city drive. What I found really strange was that the oil temp was higher on EV mode vs ICE. When on ICE the temp was 140F and 160F when on EV. This was using the Carista APP. Does that make any sense? Edit: For reference...

I'm considering using either Mobil 1 or Valvoline 0W-20 Hybrid oils for those in between 5k OCI and DIY. Apparently those are formulated to minimize fuel dilution and moisture. Could they be just marketing gimmicks? Basically: Every 10k: 0W-16 *free / dealer included up to 40k Every 5k: 0W-20...

Agree! There are exceptions, but that's the norm. ^^^

Thanks to ALL! I found all this discussion and topic very interesting. Fortunately I'm in a warmer climate so I don't get the extreme cold temperatures most of lower 48 is experiencing right now. I was looking into the overseas manual and although it shows multiple grades as acceptable, it...

Thank you very much! Very informative. I'm still learning and researching about this. I always like to know the why and how stuff works of things. Maybe it's the Engineering/Physics background in me. I still like the CCN as he appears to be very knowledgeable and a very good experienced...

I remembered 0W-20 for other countries but not 5w30. Didn't know that video was discussed previously. It did make sense as anything that is suppose to perform variable fluid pressure has to take into account the liquid viscosity. A water pressure washer will not make the advertised PSI pumping...

Is not 5w30 too thick for this engine? CCN advises against such because the electronic variable oil pump is calibrated to 0W-16. (View minute 6:26)

Yes, I know! But it's the Caribbean; so it's also very humid. So far I'm keeping my 6mo/5k OCI to minimize fuel dilution/water condensation. Since I'm low mileage driver my 6mo/5k OCI is actually more like a 6mo/3-4k OCI.

It was pointed out on another forum of an UOA for a Rav4 Hybrid (short trips) which has the same A25A-FXS engine as my car. I was really surprised of the high fuel dilution of 5+% and 2.2% with only 4,978 miles and 3,106 miles of oil usage respectively. Didn't expect that from a hybrid which...

In my case is about $90 every other 6mo service, but I really don't mind the additional oil change cost. I view them as a small investment/insurance given the vehicle cost. Until warranty, and free yearly oil changes, expires at 4yr/4k I'll keep doing them at the dealership. I still have to be...

Thanks! I do plan to keep the car for long; although at my current driving pace the car body will break off, or become a Classic, before I get to the 150k mark. ;) My next service interval is in Feb 20, 2025 for the 15k/18mo which does not includes oil change. At that point my oil will have...

Thanks! Would you care to explain the why of this piston rings stick due to oil time (6mo) on low millage driving conditions ~5k/yr. Don't get me wrong, I'm all in for the 6mo/5k OCI mostly since I fall into the "Special Operating Conditions" as per owner's manual recommendation. Also, I don't...

Good to know. Thanks! I'll try to use a FWD just to get the BSL vs OA comparison on my next OCI.

Yes, unfortunately OA are not available for my area. Still, although BSL estimations are inaccurate, I suppose getting presence reported probably means a meaningful measurable number on OA. Maybe some "Italian tuneups" between OCI?

Thanks to all for the responses. Update: Did my last OC on August 28, 2024 (third overall). It was the free 12mo/10,000mi OCI although the car only had 4,751 miles. Couldn't do the BSL dilution % vs UOA as OA does not service PR. But, BSL did acknowledge some dilution this time. Comparing all...