Castle® OEG™ (Oil Efficiency Guarantee) is formulated with the most advanced friction modifiers on the market to prevent component failure and extend engine life. Using OEG™ will result in fuel efficiency increases enough to cover the cost of the product.
1. Add one bottle to crankcase with oil change.
Use the convenient Contact form to email your questions or comments, or call us at:
U.S. customers, please visit the Castle U.S. Website,
or call 1-800-876-0222.