I just picked up a 5 qt jug of Mobil 1 5W-30 (the new "SuperSyn") stuff for $17.88. It's on sale for Father's Day at Wal Mart.
Get this:
1 qt price: $4.22
5 qt price: $17.88
6 qt price (case of 1 qt bottles): $28.62
Do the math on that one. Tell me if it makes sense. I checked all 3 prices at the scanner. But if you want to change for cost - go to your local Wal Mart and stay synth.
To answer your question, I don't think there is any problem with switching from synth to dino.
