# Service bulletin TT\-15\-023

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

- Type: Service bulletin
- NHTSA id: 10184862
- Published by NHTSA: 2020\-12\-28
- Manufacturer's number: TT\-15\-023
- Manufacturer's date: 2015\-09\-10
- NHTSA component: ENGINE AND ENGINE COOLING

## NHTSA's summary

Hino Conventional Models. The Long Life Coolant and Extended Long Life coolant in Hino Conventional models differ greatly in formula and should never be mixed with other brands of coolant. The differences and information on both formulas will be explained.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2015/MC-10184862-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2015/MC-10184862-9999.pdf)

The document is the manufacturer's. This site does not hold it.

## Components

Engine

## Vehicles listed

- 2011 to 2016 HINO CONVENTIONAL MODELS

JSON: [/v1/bulletins/10184862](/v1/bulletins/10184862)

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