Locomotive engine manufacturers operate restrictive, basestock-specific lubricant approval schemes. Approvals are obtained on an “as needed” basis. Where a specific manufacturer’s approval is required, prior confirmation of the availability of such should be sought.
Due to the higher dispersancy of Delo 6200, it is not suitable for use in engines which are equipped with active purification systems where marine trunk piston engine oils (TPEOs), such
as Delo 2000 Marine, should be used.
Such systems continuously remove combustion
contaminants from the oil, by use of centrifugal type separators and automatic back flushing type filtration systems. As a consequence, TPEOs are formulated to hold contaminants in suspension while in the engine and reserve tank, but release them in the purification system. At the same t i m e , t h e y m u s t r e s i s t t h e l o s s o f d e t e r g e n t / d i s p e r s a n t a d d i t i v e s w i t h t h e c o n t a m i n a n t s w h i l s t undergoing purification. railroad diesel engine Because of this, they are formulated differently from automotive and oils that are designed for systems without active purification.
Consequently, one type should never be substituted for the other.
With regard to high speed, two-cycle diesel engines, Detroit Diesel has a strong preference for low sulfated ash lubricants. However, for high sulfur fuel applications, Detroit Diesel recognizes the benefits of higher ash, “zinc-free”, Delo 6200 type oils in controlling sulfur-related corrosive wear.