Hand pump for Opti-Lube one gallon bottles.
Opti-lube produces excellent diesel fuel additives, with different formulations to fit different needs. From their website:
"Opti-Lube's main objective with our additives is quality. Everyone has different goals in mind for treating the fuel they put in their vehicle, so our products try to work with every goal and climate to produce positive experiences for our clients. All of our products are safe to use with DPF equipped engines."