Model: INFINITI Q50. Year: 2016. Part Grade Abbreviations. C = Greater than 200k miles. B = Greater than 60k miles and less than or equal to 200k miles but greater than 15k miles per year. A = Less than or equal to 60k miles, or greater than 60k miles but less than or equal to 200k miles and less than or equal to 15k miles per year.
