WEN 55201 vs. Permatex 80037 — Which Is Better?

Price — Permatex is cheaper

The Permatex 80037 undercuts the WEN by making it the budget-friendly option. versus it’s the more affordable choice for a consumable compound. However, the WEN’s premium brings a reusable diagnostic tool you’ll use every oil change, potentially saving you from expensive repairs. For those who check oil regularly, that small difference can pay off quickly.

User Rating — Permatex scores slightly higher

Buyers rate the Permatex 0.1 stars above the WEN, with 4.8/5 across 4,694 reviews. This reflects strong satisfaction for a product that does exactly one job well—cutting valve seats quickly. Meanwhile, the WEN’s 4.7-star rating from 6,891 users shows widespread approval for its reliability in daily use. Both ratings are excellent, and the tiny gap means quality isn’t a deciding factor.

Number of Reviews — WEN has a larger footprint

With 6,891 reviews, the WEN has been purchased and rated far more often. That bigger validation gives confidence in its reliability for everyday use. The Permatex’s 4,694 reviews still represent a huge sample, but the WEN’s higher adoption suggests it’s the go-to for DIY maintenance. More users trust it for regular oil checks, and that volume of feedback reinforces its consistent performance.

Installation Ease — WEN is plug-and-play

The WEN requires no tools; simply pull out your old dipstick and insert this one. The Permatex demands mechanical know-how, a lapping tool, and a steady hand. With the compound, you’ll need to apply a small amount to the valve face, then rotate the valve back and forth against the seat using a dedicated lapping tool (sold separately). It’s a hands-on process that rewards patience but can frustrate a novice.

Diagnostic Capability — WEN wins uniquely

Only the WEN offers a magnetic tip that catches metal particles during oil checks. This early warning can prevent catastrophic engine damage. When you pull the dipstick, any ferrous debris is clearly visible on the tip, indicating abnormal wear in bearings, cylinders, or other components. It turns a routine check into a quick health scan, giving you a chance to address issues before they escalate.

Compatibility — Permatex works on anything

The Permatex compound is universal, suiting any engine that needs valve lapping. The WEN dipstick is designed for specific engines, so verify your vehicle’s specs first. Measure your existing dipstick’s length and thread before ordering, as it may not fit all models. The Permatex compound avoids any fitment issues entirely.

Material Quality — Both are solid

Both products meet high standards for their respective materials. The WEN’s steel construction withstands high oil temperatures and resists corrosion, while the magnetic tip is securely bonded. Permatex’s silicon carbide grit in an oil base provides consistent cutting action and doesn’t break down quickly under pressure. Each is built to perform reliably in its intended environment.

Best For — Different tools for different jobs

The WEN is ideal for routine oil changes and wear monitoring. The Permatex shines when you’re rebuilding a cylinder head and need a tight valve seal. If your garage routine involves monthly oil checks, the magnetic dipstick adds a layer of preventative maintenance. Reserve the grinding compound for those rare but critical valve jobs, and you’ll have two tools that complement rather than compete.