Im sure its been asked but you always hear about how not to switch from but synthetics to regular. Does it really matter.

You can switch back and forth with no problems. It will not cause anything bad at all they are fully compatible.

x2

I would agree. My 96 has been back and forth for the past couple years. Still runs great.

"Does it really matter."?

To the engine? No.

To your wallet? Well, that depends upon how you'll use use the dino and the synethtic.