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John Martin analyzes the results of adding 13 more engine oils to an existing survey of 8 oils. [1] He explains the importance of both the additive package (15-20% of oil) and base stock (69-80%) in determining oil performance. [2] Base stock quality has improved over time from Group I to Group V, with higher groups indicating better performance. [3] For most engines, a Group III or IV mineral or synthetic oil is suitable, but synthetics are only needed for extreme temperatures or maximum performance.

Author

voyager1

Language

EN