Using white bottle which is supposed to have anti-gel protection, but at the ratio I'm using it, it didn't work. The ratio I'm using is just slightly higher than recommended.
If you are already a little over PS dosage recommendations, then you may have other things going on....
1) Water in fuel at source tanks. Buy diesel from a high volume truck stop if you can. Use a water separating funnel (like Mr Funnel) when pouring into your tractor. Check the water separator on-tractor often.
2) If you have microbial (aka guck) contamination, you may need to use a biocide. ULSD + water tends to grow bugs easily.
Rgds, D.