I have been using Delvac 1 0W40 ESP in our small fleet at work (Cummins ISB, Cat C7, Mercedes 906) in the winter and 15W40 in the summer.
If I used Delvac 1300 10W30, will the engines be adversely affected during cold starts in winter? We might get about five days in a winter where the temperature drops below -20C. It never drops below -25C. We do not use block heaters. The engines have always started up easily with the 0W40.
If I used Delvac 1300 10W30, will the engines be adversely affected during cold starts in winter? We might get about five days in a winter where the temperature drops below -20C. It never drops below -25C. We do not use block heaters. The engines have always started up easily with the 0W40.