2013 Got a low coolant light. Couldn’t find a leak. Was time to flush coolant anyway so I flushed and refilled with PEAK Final Charge. I’ve always used Fleet with great results and this is supposed to be improved. A week later, still having to add coolant. Checked for leak and found very small leak under ac compressor. After several hours of frustrating work, I got to the Oring. I uave had some pretty frustrating luck with vehicles lately. So now my vehicle is down until I get this rubber replaced. Ugggh.

 

The small oring is only used when you want to drain the oil filter b4 replacing on most cases you just take the hole oil cap off and there is never need to replace the small gasket but if you do take it lose then it needs to be replaced