I converted the customer from Company X to Valvoline and the customer reported sudden increase in oil consumption. Is my product at fault?
This classic complaint can happen in 5-10% cases when changing brands of motor oils. This has been occurring for years, and can occur when changing from one brand to the other (same company), as well as one company to another. Remember, in all such changes, increase in consumption of oil is observed for a short period of time (1-2 change intervals), and then returns to the previous low level. Interestingly, if one returns to the original brand, higher oil consumption is again observed!