I have a Mini Fastrack 15/36 and I noticed an oil spot on my trailer where it was parked. It was right next to the left tire and about 1-1/2" wide. I looked under and felt around the hydro and the only place I could feel any oil was from the breather tube. Is this something to be concerned about? Since the MFT uses the EZT hydros, can the oil level be checked and topped off?