Best Oil Additive For Engine Knock

Liqui Moly (20002) Cera Tec Friction Modifier - 300 ml

Archoil AR9100 Oil Additive (16oz) for All Vehicles - Powerstroke Cold Starts, Eliminates Injector Problems…

Lucas Oil H/D Oil Stabilizer/12x1/Quart, Multi, One Size (10001)

Liqui Moly 2009 Anti-Friction Oil Treatment - 300 ml

Restore (00012) 6-Cylinder Formula Engine Restorer and Lubricant - 12.5 oz.

Lucas Oil 10063 Engine Break-In Oil Additive - 16 oz

XADO Engine Oil Additive - Protection For Engines - Additive For Wear Protection & Rebuilding Of Worn Metal Surfaces - Metal Conditioner With Revitalizant 1 Stage Maximum (Up To 5qt Of Oil Capacity)

3 cans of BG EPR Engine Performance Restoration

TriboTEX Oil Additive Car Engine Treatment: Add to Engine Oil - Makes High Mileage Cars Like New with a Synthetic Material (Treats One Regular Car, Truck, Tractor or Small Diesel)

zMAX 51-011 - Engine & Fuel Formula Kit - Easy to Use - Reduces Carbon Build-Up & Lubricates Metal Extending Life of Car or Truck - Runs Efficiently, Improving Gas or Diesel Mileage - 12 oz. Each