Heavy duty, low ash monograde diesel engine oils recommended for Detroit Diesel 2 cycle engines. Mobil Delvac 1250 is especially recommended for Series 149 engines.

• Excellent protection against valve gutting/ring sticking
• Excellent protection against bore polish and reduced piston deposits
• Reduced liner and ring scuffing

OBSOLETE PRODUCT

For Roadranger applications can use Mobiltrans HD50 or Mobil Delvac Syntrans 50.