I have a 5% rockauto.com coupon code. Expires September 16 2018.
Email states that no limit on order size or the number of orders.
They also encourage to share with others.
Enter the code in the “How did you hear about us” box without any other numbers or characters.
8800491579240307
For any interested parties, any time you’re buying from RockAuto, google “rockauto discount” and copy whatever code retailmenot (or similar) provides. They always have valid 5% discounts.
I was about to order about $600 in parts for my truck from them. Thanks for the discount code. Every little bit of savings helps. 
You are welcome. “needs to be 20 characters”