Cart Continue shopping “General Lubrication Theory Overview” 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 × General Lubrication Theory Overview $0.00 General Lubrication Theory Overview quantity $0.00 Code: Apply code Update cart Cart totals Subtotal $1,800.00 Total $1,800.00 Proceed to checkout Coupon codes are not eligible to be used for exam fees. A separate transaction is required.