Island use fuel additive.

[Synjar]

According to a quick internet search (I know how some love it when we search before we ask questions) the island use fuel additive that is called out in the LC’s owners manual to be added every 5000 miles is due to the lack of available Ethanol blends in places like Hawaii or Puerto Rico.

So one can infer Ethanol blends keep your engine cleaner than non-Ethanol blends.

Is there a Toyota part number for this additive?

Honestly I have not searched for a part number.

 

[D-mac]

Seems to me the same owners manual would list the Toyota part number if required.

 

[Synjar]

Maybe.

 

[supernova]

good to know.
this is the part number
Toyota Genuine #00289-EFI34