1. Check API Service Category: Ensure both oils carry the same API Service Category (e.g., API SN, API SP) or higher to ensure compatibility with your vehicle's engine.
2. Viscosity Grade: Make sure the viscosities (e.g., 5W-30, 10W-40) of the oils are the same or very close. Mixing slightly different viscosities (within the same SAE grade range) is usually not a problem.
3. Synthetic or Conventional: Mixing synthetic and conventional oils is generally not an issue, as long as they have the same viscosity grade and meet your vehicle's specifications. However, it's not recommended to mix different synthetic blends (e.g., full synthetic with synthetic blend).
4. Additives: Some motor oils may contain additional additives or proprietary formulations. While mixing different brands might not cause any immediate harm, it's best to use the same brand and type of oil consistently for optimal performance and to avoid any potential issues.
It's important to note that mixing different motor oils doesn't necessarily result in a better performing blend. It's always recommended to refer to your vehicle's owner's manual for the specific oil requirements and consult with a qualified mechanic if you have any doubts or concerns about mixing different motor oils.
