I am new to this site so please forgive me if this thread is out of context. I have found a solution to the fuel splash back problem in the 2007-2011 Jeep JK! There is a part that can be replaced in the fuel intake line. This part (#CNNNX321AC) can be ordered on line at amazon. The cost is around $35.00. This part has a check valve which keeps the fuel from splashing back out of the fuel line filler. I installed this part yesterday and now no splash back. It took me all of about 20 min. to replace the part. I hope this helps!!