[NissTier]

TC-W3 - Yes, marine 2-stroke oil. I'll let you do your own research to determine amounts and whether you want to try it but I have ran it for 40,000+ miles now with nothing but great results. Way quieter start ups, smoother idle, slightly better mpg, and maybe even a bit more power.

 

[NissTier]

There is undoubtedly a wide range of 2-stroke oils, so...
Really curious just how compatible combusted/oxidized 2-stroke oils are in the primary cats? Some minerals, such as zinc, will murder the catalytic material.

Zero heavy metals and zero ash with a quality TC-W3 oil

 

[NissTier]

Are you still running your original/factory primary cats in your '13?

Yes, it currently has 160,00 miles. I have run the 2 stroke oil in every single tank except for 2 since about 115,000 miles. I skipped the two tanks on purpose just to prove to myself that it was working and not just in my head and it definitely works. The clatter the VQ40 is known for during a cold start is almost non existent now which is the big indicator to me that something good is happening for sure.

 

[NissTier]

Gas: 1 oz per 5 gallons round down
Diesel: 2 oz per 5 gallons round up

Examples: gas fillup with 17 gallons put in 3 oz of TC-W3 (my normal), diesel fillup with 17 gallons put in 8 oz