'21 Sienna 2.5l hybrid 202k mi; PU 0w-20 4.6k mi

[Sienna dude]

The weather was warm and I drove a lot on the highway, 5000 miles in a month

2021 Toyota Sienna with 2.5L Dynamic Force hybrid.

@OVERKILL You were right, I've been having fuel in the oil all these years. Blackstone kept me blind. I don't get it man, I drive a ton

 

[Brian123]

Blackstone for the Fail, maybe step up to 5W-30! If 5W-30 does not work out, there is always 5W-40!

 

[Sienna dude]

Blackstone for the Fail, maybe step up to 5W-30! If 5W-30 does not work out, there is always 5W-40!

I would like to have no fuel in there to begin with

 

[OVERKILL]

I figured as much. This is why you use a lab that does GC.

 

[Sienna dude]

I figured as much. This is why you use a lab that does GC.

So what do you recommend now?

 

[brandon9715]

I’m semi surprised the fuel dilution is still relatively high on an engine that is both port and direct injected. My dad’s 2016 F150 with 2.7L is direct injection only and had over 5% fuel dilution in 12k miles. It is terrible.

 

[OVERKILL]

So what do you recommend now?

There isn't really anything you can do about it. 7.8 isn't super low, so if you are OK with that visc, just keep doing what you are doing. If you aren't, stepping up to an xW-30 is probably a reasonable option to keep visc where you want it to be.

 

[Sienna dude]

There isn't really anything you can do about it. 7.8 isn't super low, so if you are OK with that visc, just keep doing what you are doing. If you aren't, stepping up to an xW-30 is probably a reasonable option to keep visc where you want it to be.

Well I made it to 200,000 miles with 6.5, so viscosity hasn't been an issue. I think I'm going to have to change my habit of idling

 

[wemay]

There isn't really anything you can do about it. 7.8 isn't super low, so if you are OK with that visc, just keep doing what you are doing. If you aren't, stepping up to an xW-30 is probably a reasonable option to keep visc where you want it to be.

 

[Sienna dude]

Viscosity is not an issue on this stupid motor that runs cool all the time IMHO

 

[Glenda W.]

The oil not getting very hot probably doesn’t help much with the fuel dilution I‘d imagine.

 

[Sienna dude]

Stupid thing is at 156 degrees after 90 minutes on the highway

 

[Sienna dude]

Let's see how things look after that drive. I don't have much hope. It is all downhill, engine off at 70 mph. If it stayed at 156 degrees climbing the mountain, it won't do any better rolling down the mountain.

 

[Sienna dude]

Toyota has done some serious wizardry with this motor, I hope that wizardry includes some protection against fuel

 

[Sienna dude]

Nah, she says I'm cool

 

[Sienna dude]

Touched 178 for a brief moment and went down back to 171 after engine shut off

 

[Sienna dude]

 

[JunkdrawerDog]

Get yourself an oil extractor. Every thousand miles or so, draw off two quarts and replace with two. Oil dilution % down, TBN up. Only takes a few minutes.

 

[We're Metals]

Wear looks fine, whats the worry?

Or 0W-30?

 

[edyvw]

View attachment 285478View attachment 285479

Your engine oil temperature is too low. It just cannot get there for two reasons:
1. In the city, you will run on battery a lot.
2. On the interstate, well, it is Toyota, they tend to run colder. One of the solutions could be to get thermostat with higher temperature, if it exists.

As a solution, there is none. You could bump the viscosity, but I would be careful. Those engines start on demand, and you don't want thick oil going from 0 to 3000 rpm. In this case, thin is good. As @OVERKILL stated, your KV100 is not that bad for 0W20. You could try some thinner 0W30 or 5W30 if not in a cold environment. Pennoil Ultra Platinum 5W30 would be a good choice as KV100 is just on the border to be 20 grade.