Rislone Compression Repair with Ring Seal is a proprietary blend of petroleum additives developed for higher-mileage engines suffering from decreased or uneven compression that can be caused by normal ...

Prolong Super Lubricants’ Super Heavy Duty Oil Stabilizer, which works in both gas and diesels, creates a seal around the piston rings to restore compression, slowing down exhaust blow-by and reducing ...

A compression test reveals the condition of your engine's valves, its valve seats, and piston rings and whether these parts are wearing evenly. Healthy engines should have compression over 100 psi per ...