Synthetic or Conventional Oil?

Usage
Now, while the companies don't recommend mixing or switching back and forth, one company's synthetics are fully compatible with others and compatible with conventional oils. The source of compatibility problems was high levels of ester in the earlier synthetics. Considering the consequences, it's best to verify this compatibility, either on the company's website or with your trusted mechanic.


Next, oil changes. The PAO base stock does hold up longer than petroleum-based oils, but the additives in both wear out at the same rate. The oil companies have tested their synthetics for longevity, but they still recommend following the specific owner's manual for oil change intervals.


As for special oil filters or special disposal techniques for those who change their own oil, that's easy. You can use the same filter and follow the same disposal procedures that you would with conventional oils.


So, should you bite the bullet and fork over more money for synthetics? Sure, if you want to. If you are in a fully committed relationship with the car of your dreams, and have decided that car is worth the cost, spring for that Dom Perignon.