I was on the road far from home, but had a half hour to kill and was way due for an oil change, so I went to Jiffy Lube. I was observing through the office windor while they topped off the fluids. At the time, I assumed they topped off the brake fluid, but when I was brought to the bay I realized that they had topped off the CVT transmission fluid with normal tranmission fluid - they obviously didn't use the special CVT fluid. How bad is this? They only topped it off, so the mix is probably 80/20 CVT/transmission fluid, but I would have preffered if they left it alone. Thoughts? Should I flush it and have it re-filled properly at the Nissan dealer?