I hope this won't be flagged as spam, but then again we don't really have an admin around here. I'm just trying to spread the word to fellow ES owners.
If you purchase a 5 quart jug of RP oil and add one of their filters, the filter gets reduced to $0.
Just placed an order for 5W20(not for the ES), which is already out of stock. 5W30 is still available, at the moment.
Oh and shipping is free.
The promotion runs until the end of December 2013.