Cart Continue shopping “Advanced Lubricant Additive Chemistry” has been added to your cart. Product Price Quantity Total × Certified Lubrication Specialist (CLS®) Certification Exam Preparation $1,800.00 Certified Lubrication Specialist (CLS®) Certification Exam Preparation quantity $1,800.00 × Advanced Lubricant Additive Chemistry $299.00 Advanced Lubricant Additive Chemistry quantity $299.00 Code: Apply code Update cart Cart totals Subtotal $2,099.00 Total $2,099.00 Proceed to checkout Coupon codes are not eligible to be used for exam fees. A separate transaction is required.