So you can mix synthetic with diesel oil and it will work? I was always under the impression that once you put synthetic in a motor you could only run synthetic from then on. Something about additives in the synthetic oil actually repelling normal oil and causing wear on parts. Is this just misinformation or is there any truth to it?
On the bottle it will say compatible with synthetic and conventional motor oils. It may just say all motor oils.
When our fleet oil guy came in and I told him I was using Shells 5w40 synthetic he got pissed because he hates Shells mas marketing approach on a what he calls a genetic not so great oil product.
Anyway he told me to mix 1 gallon of his oil to 2 gallons of the Rotella so I get the benefits of his additive package and the lower pour point of the synthetic. ( he wishes they had a synthetic oil product but most fleets always have their trucks plugged in and my area doesn't fall under the 5w30 or 5w40 synthetic oil in winter time I.E. temps in the single digits. We may get 2 to 5 of those nights during the whole winter.