HOME » KL-21 Engine Oil Treatment KL-21 Engine Oil Treatment Additive Product Overview: Goodyear Engine Oil Treatment is a powerful additive agent that helps to: Effectively boost engine performance. Increase torque and horsepower. Improve fuel economy. Extend oil change intervals. Protect against engine wear. Form a resilient lubricant film. Intructions: Add 1 bottle to 4-6 litres of engine oil. Can be added at any time, during or in between oil changes. USEFUL RESOURCES Product Data Sheets CODE / GRADE / PACKAGING CODE GRADE PACKAGING 71-000007 KL-21 Engine Oil Treatment 250ml x 24 Need help? We can help you find the right product, answer technical questions, or just about anything else. Just let us know what you need. CONTACT US