# 🔧 How accurate is the Lisle 20250 Compression Tester?

*Published: 2024-04-03 | Updated: 2024-10-24 | Source: https://shopsavvy.com/answers/how-accurate-is-the-lisle-20250-compression-tester*

---

## Product: Lisle Compression Tester
**Brand:** Lisle

The Lisle 20250 Compression Tester is a favorite among DIYers and pros alike for checking engine health. Our research shows it's designed to accurately measure compression in gasoline engines, handling pressures up to 300 PSI (or 2100 kpa), so it's pretty versatile for different projects.

One thing that sets the Lisle 20250 apart is that it works with 14mm and 18mm spark plug threads. This makes it handy for both cars and motorcycles. According to our data, this flexibility is a big plus for many, adding real value to any toolkit.

Speaking of build quality, the Lisle 20250 doesn't disappoint. It’s made with durable materials like a tough hose and brass fittings, which ensure a good seal while testing. Some folks have mentioned that the adapter might loosen when unscrewing, which can be a bit of a hassle, but it generally doesn’t mess with its overall reliability.

As for accuracy, that's a highlight. Most feedback suggests it gives consistent, clear readings—critical for figuring out engine issues. However, there have been a few notes about the gauge's accuracy and the pressure release valve having some hiccups. Even so, the overall impression of this tester is positive, with many praising its precision.

Considering what it costs, the Lisle 20250 offers solid value. It's a solid option if you're working on engines regularly, whether you're a professional or just love tinkering at home. 

It's a trustworthy tool that combines functionality and affordability, which is why it's often recommended for those needing a reliable compression tester.

## Current Prices

| Retailer | Price | Availability |
|----------|-------|-------------|
| Auto Parts and Stuff | $29.99  | Check |
| Amazon | $34.15  | Check |
| Modded Euros | $36.89  | Check |
| ToolTopia.com | $37.72  | Check |
| Auto Body Toolmart | $50.95  | Check |
| Direct Tool Source | $53.60  | Check |

---

*Where this comes from: This answer is based on ShopSavvy's product database, real-time pricing from thousands of retailers, and analysis of user reviews to give you a well-rounded picture.*