In the vaping world, many terms and abbreviations are used. This text explains at a basic level the difference between MTL (mouth-to-lung) and DTL (direct-to-lung), as well as how e-liquids and devices are usually adapted for each usage method.
What is the difference between MTL and DTL?
MTL (mouth-to-lung) is usually used with lower power and higher-resistance coils. DTL (direct-to-lung) is usually used with higher power and lower-resistance coils. The choice of e-liquid and airflow is adjusted accordingly.
Overview: typical settings and e-liquids
The information below consists of general examples. Always follow the specific product information for your particular device and coil.
| E-liquid (example ratio) | Typical use | Coil resistance (ohms) | Power (watts) |
|---|---|---|---|
| 50 VG / 50 PG | Often MTL | ≈ 1.0Ω and higher | ≈ 10–20 W (according to the coil specifications) |
| 60 VG / 40 PG | MTL or RDL (middle ground) | ≈ 0.6–1.2Ω | ≈ 15–30 W (according to the coil specifications) |
| 70 VG / 30 PG | Often DTL | Below 1.0Ω (“sub-ohm”) | ≈ 30 W and above (according to the coil specifications) |
VG/PG – what does the ratio mean?
- VG (vegetable glycerin) affects the viscosity of the liquid. Higher VG produces a thicker liquid and generally requires more power.
- PG (propylene glycol) is thinner and is used to dilute the liquid. The VG/PG ratio is chosen based on the device’s recommendations.
How do I know if the e-liquid is suitable for MTL or DTL?
Check the product information for both the e-liquid and the device. The manufacturer usually specifies the recommended VG/PG ratio, compatible coils, and suggested power for MTL and DTL, respectively.
About nicotine strengths
E-liquids may be available in different nicotine strengths. Which levels are offered depends on the product and manufacturer. Always follow the labeling on the packaging as well as the information on the product page.
Summary
- MTL: often higher coil resistance and lower power.
- DTL: often lower coil resistance (sub-ohm) and higher power.
- Choose the VG/PG ratio according to the specifications of the device and coil.
This text is intended as general product information. For safe and correct use, always follow the instructions supplied with your specific product.
