2016 v6 SR5 Dreaded Diesel sound, oil weight question

[Hammer0313]

On a serious note. I have an engine building background and have worked for Toyota Service for 6 years. I would not recommend changing to a heavier oil, from a bearing clearance standpoint and from a VVTI standpoint. Yeah some people have run 5W20 but this only effects cold start but going to a 5W30 will be a all around thicker oil. On a very tight tolerance engine this will result in higher oil pressure and reduced lubrication to the bearings. Will it hurt something, well I can't answer that but I wouldn't risk it.

You could try a few different oils to see if that would change the sound. It's expensive but you might pick up some Redline 0W20 and give it a try. It's quieter in my CTS-V then Mobil 1. I haven't tried it in the 4Runner yet. About to change the oil and catch a sample to have analysis done to compare Toyota oil to Mobile 1 and then Redline. Just curious TBN numbers between them.

Good luck.

^^^^^ This^^^^^
Redline is a True group 4 and 5 synthetic base oil with a high moly content added to the additive package. Moly is a fantastic additive and has a plating affect on internal parts, But, needs heat + pressure + TIME to do its thing. Guys on the Ram forum have done some really impressive things reducing engine noise (Hemi Tick) using Redline oils. If you go the Redline route give it 500-1500 miles for the moly to do its thing.
PQIA just tested the Toyota 0w20 and its LOADED with moly, 700+ppm. That's huge!!!! But I'm not sure if its a group 3 base oil (fake synthetic) or a true group 4-5 synthetic base. Either way both look go on paper!

 

[IanB]

I've had a few people comment on how noisy the 4.0L is, it has a bit of a clatter for sure at idle compared to other engines, but sounds nothing like my diesel.

Another friend with a 4.0L Tacoma says his sounds very similar, it sounds like they are just noisy motors?

 

[Dillusion]

Older technology will do that.

You should hear my 99 Accord DD.

 

[83Mule]

I run 0/20 and 5/20 but you won't hurt it with 10/30 if it's above freezing, It's a lot hotter in my valley than Puerto Rico! The noise is not from metal on metal contact, so you aren't going to silence it with heavier oil. It is a product of the way the engine architecture is laid out.

 

[VTSR5]

...If you start up a gen 5 or a gen 6, 4.0L engine and listen carefully ...

Hol up...are you from the future? Do they keep the roll-down lift gate window?

 

[steelevo]

Older technology will do that.

You should hear my 99 Accord DD.

Funny that you mention an older Honda Accord. I’ve had all of my Honda/ Acura cars develop valve tick over time. The problem lies with the valves not auto adjusting. A valve lash adjustment every 50k miles would fix the issue.

I never had this issue with my 2.4L Tacoma, but I did have a valve adjustment issue on my 98 Supra. After an adjustment was done, the ticking sound reduced significantly.

I wonder if Toyota is having the same valve adjustment issue on the 4.0L?