Are the additive packages compatible? I realize there is little advantage to mixing these two. I am only asking because I have 2 qts of Drive Clean Blend leftover. From this forum, I have learned that the blend really isn't a good value. I'd like to "use up" this oil, and I was wondering if I'd be OK to mix it with dino Drive Clean, rather than spend $2.38/Qt. on the blend. Opinions?