When considering vehicle maintenance, one might ponder: Should I change my oil based on mileage or time? This question often arises among car owners striving to maintain their vehicle in optimal condition. On one hand, there are manufacturers who recommend oil changes at specific mileage intervals, suggesting that the lubricant’s efficacy diminishes with extended use. On the other hand, some advocates argue that time plays a crucial role as well, particularly for those who may not drive frequently or take long trips. Does age affect oil quality, even when mileage remains low? Furthermore, how do factors like driving conditions, engine type, and oil formulation influence this decision? Are there scenarios in which temporal degradation of oil is more detrimental than its mileage counterpart? As we explore this dichotomy, can we definitively conclude whether a mileage-based schedule or a time-oriented approach is superior for maintaining engine health? What insights can we glean from experts in automotive care?