# Service bulletin No. 26\-20

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: 10177928
- Published by NHTSA: 2020\-08\-05
- Manufacturer's number: No. 26\-20
- Manufacturer's date: 2020\-07\-10
- NHTSA component: ENGINE AND ENGINE COOLING:ENGINE:OIL/LUBRICATION

## NHTSA's summary

List of approved C30 engine oils for Porsche classic vehicles.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2020/MC-10177928-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2020/MC-10177928-9999.pdf)

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

## Components

Engine, Engine oil and lubrication

## Vehicles listed

- 1984 PORSCHE 911
- 1984 PORSCHE 928
- 1984 PORSCHE 944

## Other bulletins for the same vehicles and component

- [No. 19\-23](/bulletins/10243588.md), 2023-10-05, Service bulletin: ENGINE AND ENGINE COOLING:ENGINE:OIL/LUBRICATION. Manufacturers certificate for an overview of approved Porsche A40 engine oils.
- [No. 18\-23](/bulletins/10243587.md), 2023-10-05, Service bulletin: ENGINE AND ENGINE COOLING:ENGINE:OIL/LUBRICATION. Manufacturers certificate for an overview of approved Porsche C40 engine oils.
- [No. 17\-23](/bulletins/10243586.md), 2023-10-05, Service bulletin: ENGINE AND ENGINE COOLING:ENGINE:OIL/LUBRICATION. Manufacturers certificate for an overview of approved Porsche C30 engine oils.
- [No. 16\-23](/bulletins/10243585.md), 2023-10-05, Service bulletin: ENGINE AND ENGINE COOLING:ENGINE:OIL/LUBRICATION. Manufacturers certificate for an overview of approved Porsche C20 engine oils.
- [No. 27\-20](/bulletins/10177929.md), 2020-08-05, Service bulletin: ENGINE AND ENGINE COOLING:ENGINE:OIL/LUBRICATION. List of approved C40 engine oils for Classic Porsche vehicles.
- [No. 25\-20](/bulletins/10177926.md), 2020-08-05, Service bulletin: ENGINE AND ENGINE COOLING:ENGINE:OIL/LUBRICATION. List of approved C20 engine oils for classic Porsche vehicles.

JSON: [/v1/bulletins/10177928](/v1/bulletins/10177928)

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