What vape filling machine is best for thick oil?

Best picks by scenario

< 2,000 units/day (semi-auto, lowest cost):
CoolJarz HotShot (750/1500) — handheld/semi-auto guns purpose-built for viscous oils; marketed to handle “distillate and other thick concentrates,” with versions rated up to ~12k/day depending on shift/crew.
Cooljarz
+1

2,000–8,000+/day (fully auto, high precision & terpene care):
Vape-Jet (fully automatic) — 3 independently heated zones (reservoir, pump, needle) and nitrogen-pressurized fluid path to run lower temperatures while maintaining flow—ideal for very thick oil without cooking it.
Vape-Jet
+1

High-throughput tray systems / robust industrial build:
Thompson Duke Industrial IZR/SVH — US-made, CE/cETLus, heated reservoir up to 93 °C (200 °F) for high-viscosity oils; large tray arrays for scale.
thompsondukeindustrial.com
+1

Batch/tray filling with very high burst speed:
Convectium 710 Shark — fills up to 100 devices in <60 s with dual heat injection (to 125 °C); best when you need fast batch cycles and have matching capping workflow.
Convectium

Modular/smaller lines, easy cleaning:
ATG Pharma RoboCAP/ML-1 — peristaltic/pressure options, ±1.5% accuracy, heating add-ons available; RL-series lists 1,500–3,000/hr depending on setup. (Peristaltic is great to clean; ensure adequate heat for very viscous oils.)
scisolinc.com
+2
ATG Pharma
+2

What to insist on for thick oil (your spec checklist)

Heat where it matters: independently controlled reservoir + pump + needle zones; avoid single-zone systems that force higher temps.
Vape-Jet

Short, heated, inert fluid path (316L/PTFE) and nitrogen blanket/pressurization to limit oxidation and keep temps down.
Vape-Jet

Accurate small-volume dosing (look for ~±1–2% or better) and trays/jigs matched to your hardware.
scisolinc.com

Throughput that matches your capping/QA so filling isn’t the bottleneck (e.g., 100-at-once tray fillers or 1.5–3k/hr lines).
Convectium
+1

Bottom line:
If your priority is quality at lower temps with very thick oil, go Vape-Jet. For industrial, scalable tray workflows and high-heat headroom, Thompson Duke or Convectium. For budget/semi-auto or pilot runs, CoolJarz HotShot; for modular lines with easy cleaning, ATG RoboCAP/ML-1. Match the pick to your daily units, target temperature, and downstream capping/QA.
ATG Pharma
+4
Vape-Jet
+4
thompsondukeindustrial.com
+4

If you share your daily output target, oil type/viscosity, and device format (510 vs AIO, 1 ml vs 2 ml), I’ll turn this into a one-page sourcing brief with exact model/needle/temperature setpoints.