Let me start by saying these pads are a lifesaver in my garage. As someone who deals with oil spills daily, I appreciate how quickly they absorb without leaving any residue. The bright white color makes it super easy to spot leaks, which is a huge plus when you're working under tight deadlines.

However, don't let the 'heavyweight' name fool you. When my package arrived, I was surprised by how thin each pad is. The product photo definitely makes them look thicker than they are. That said, they still get the job done for most small to medium spills in my auto shop.

Where these really shine is in boat engine spaces - they repel water while soaking up oil like champs. I've used them under my fishing boat's engine and they've prevented some messy cleanups after rough days on the water.

The dimple pattern works as advertised for faster absorption, but heavy equipment might need multiple pads layered together. For the price, I expected slightly better capacity, but they're still more economical than constantly replacing thicker mats.

Bottom line: Great for quick cleanups and leak detection, but manage your expectations about thickness and absorption capacity if you're dealing with major spills.