Can gasoline and diesel motor oils be blended together, e.g. Neste City Pro and Neste Diesel?
Oils which are made for the same purpose of use and which meet the same quality classifications can usually be blended, regardless of whether they are single- or multi-grade oils. However, blending of oils meant for different purposes of use – e.g., those for diesel and gasoline engines – is not recommended. Nonetheless, the best way to guarantee uniform quality is to use the same oil between oil changes.
