I will have to check my prices again, but the SuperTech I am buying is full synthetic. I assume at $12 gallon the Rotella is regular oil, but don't know.
It is very easy to pay $30 to $40 a gallon (4 quarts) for full synthetic oil (price Mobile One sometime). So, I thought at approx $20 for 5 quarts, I was getting a good deal. Plus, I know from experience the oil I am using is very good oil.
My recycling method is not for everybody. As I understand it, one of the selling points for synthetic oil is you can go longer between oil changes, like 6,000 miles instead of 3,000 miles. What I am really doing is taking the oil out at 3,000 miles, gravity filtering it to remove impurities, and putting it back in for another 3,000 miles,
If you don't use much oil, probably a waste of time to recycle. On average, I use 4 to 5 quarts of oil a month. Sometimes, I change it before it is hardly used at all. So, the recycling idea occurred to me. It's an experiment, but seems to be working well, not a lot of trouble for me, and saves a few $'s. Works for me. :thumbsup: