If we manufacture the product you are using right now, then the answer might be yes.
If it is made by our competition, I will say no. We do not know the chemistry involved with our competitors products, and it is not advisable to mix chemistries. If your metalworking fluid were a soluble oil material, and you wanted to switch to a semi-synthetic material, as an example, mixing metalworking fluids does not give a good representation of what our products will do right from the start.
If you have questions on this, please contact us.