Works as advertised. Used to detect the presence of water in fuel oil tanks. It's good to know that you can find a leak before winter and you won't have heat if it drops below freezing. Test tanks at home a few times a year.
Top-Quality Amazon Basics Synthetic High Mileage Motor Oil For Enhanced Engine Performance
35 Review
π€ Enhance Your Marine Experience with Pennzoil 550045220-3PK 1 Gallon Marine Premium Plus Outboard β 2 Cycle 1 gal. jug
9 Review
Castrol Titanium 5W 40 Turbo Diesel
9 Review
16.9 Oz Rislone Nano Prime Synthetic Engine Oil Additive
18 Review