Fluids

PARTS AND LUBRICANT RECOMMENDATIONS
Lubrication specifications and maintenance schedules for the CNG Ram Van/Wagon are the same as those listed in the Rear Wheel Drive Ram Van/Wagon except where noted.

ENGINE OIL
Use the same engine oil and change intervals indicated for gasoline vehicles in the Rear Wheel Drive Ram Van/Wagon. Do not extend the oil change interval.

FUEL SYSTEM
Refer to Fuel System for information pertaining to fuel cylinders and other related fuel system components.

INTERNATIONAL SYMBOLS

Fig. 1 International Symbols:

DaimlerChrysler Corporation uses international symbols to identify engine compartment lubricant and fluid inspection and fill locations (Fig. 1).

CLASSIFICATION OF LUBRICANTS
Only lubricants bearing designations defined by the following organization should be used to service a DaimlerChrysler Corporation vehicle.
- Society of Automotive Engineers (SAE)

Fig. API Symbol:

- American Petroleum Institute (API) (Fig. 2)

Fig. 3 NLGI Symbol:

- National Lubricating Grease Institute (NLGI) (Fig. 3)

ENGINE OIL
SAE Viscosity Rating Indicates Engine Oil Viscosity
An SAE viscosity grade is used to specify the viscosity of engine oil. SAE 30 specifies a single viscosity engine oil. Engine oils also have multiple viscosities. These are specified with a dual SAE viscosity grade which indicates the cold-to-hot temperature viscosity range.
- SAE 30 = single grade engine oil.
- SAE 10W-30 = multiple grade engine oil.

DaimlerChrysler Corporation only recommends multiple grade engine oils.

API Quality Classification

This symbol (Fig. 2) on the front of an oil container means that the oil has been certified by the American Petroleum Institute (API) to meet all the lubrication requirements specified by DaimlerChrysler Corporation.

Refer to Engine for gasoline engine oil specification.

Gear Lubricants
SAE ratings also apply to multiple grade gear lubricants. In addition, API classification defines the lubricants usage.

Lubricants And Greases

Lubricating grease is rated for quality and usage by the NLGI. All approved products have the NLGI symbol (Fig. 3) on the label. At the bottom NLGI symbol is the usage and quality identification letters. Wheel bearing lubricant is identified by the letter "G". Chassis lubricant is identified by the latter "L". The letter following the usage letter indicates the quality of the lubricant. The following symbols indicate the highest quality.

SPECIALIZED LUBRICANTS AND OILS
Some maintenance or repair procedures may require the use of specialized lubricants or oils. Consult for the correct application of these lubricants.