Autool SDT206
A gauge-and-flow-meter machine with a longer warranty than most imports. It costs more than similar models.
Amazon $269.99$269.99
The Autool SDT206 is the better automotive smoke machine overall, rated 3.4 to 2.9. The Autool SDT206 leads on warranty and measurement. The Foxwell ST203 wins on value. The Foxwell ST203 costs $70 less ($199.99 vs $269.99).
Prices were last checked November 9, 2026. Product prices and availability are accurate as of that date and are subject to change; the price and availability shown on Amazon or the retailer's site at the time of purchase apply. As an Amazon Associate we earn from qualifying purchases.
Foxwell ST203
A gauge-equipped machine for intake, turbo and exhaust leaks. Skip it if EVAP codes are the main job.
Amazon $199.99$199.99
Which should you buy?
- Choose the Autool SDT206 for warranty (3-year warranty vs 1-year warranty) and measurement (pressure gauge, flow meter vs pressure gauge).
- Choose the Foxwell ST203 for value ($199.99 vs $269.99).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every no EVAP mode stated automotive smoke machine; a clear win is highlighted. How we rank explains each one.
| Factor weight | Autool SDT206 | Foxwell ST203 |
|---|---|---|
| Overall rating | 3.4/5 | 2.9/5 |
| Value 30% | 32 $269.99 | 44 $199.99 |
| Pressure coverage 25% | 50 pressure not published (neutral score used) | 43 up to 17.4 PSI |
| Measurement 20% | 80 pressure gauge, flow meter | 40 pressure gauge |
| Features 15% | 50 built-in air pump, air-only mode | 50 built-in air pump, air-only mode |
| Warranty 10% | 100 3-year warranty | 0 1-year warranty |
Specifications
| Autool SDT206 | Foxwell ST203 | |
|---|---|---|
| Pressure and smoke | ||
| EVAP mode | - | No |
| Output pressure | - | 11.6-17.4 PSI |
| Smoke output | 6 L/min | - |
| Pressure display | Gauge | Gauge |
| Flow meter | Yes | - |
| Air-only mode | Yes | Yes |
| Power and fluid | ||
| Air source | Built-in pump | Built-in pump |
| Power | - | 12V battery |
| Smoke fluid | - | mineral oil |
| In the box | ||
| Cap plugs | - | 23 pieces |
| Warranty | 3 years | 1 year |