I will post the contrary position of rockhillmanor. I avoid Loves, usually the highest percent of bio-diesel, have had more employee issues and just as long a waits as FJ. I have used FJ for years with FW's, now the MH and even when just the diesel PU I used the truck lanes with never a problem. Are there lines sometimes, yes, are there sometimes less than perfect employees, yes but you know what yesterday I had a less than perfect employee at a grocery store and the guy at the autoparts store could use more training.
Now what I won't use is the RV lanes at FJ to many inconsiderate people, including RVer's.
Also I won't wander off into a strange town within unknown traffic for 4 blocks to save a few cents on diesel. Just my personal feelings, I will pay for convenience. FJ or truck stops for me!