Whats your experience with oil leak dyes, I borrowed papa's 07 Corolla with 189k. I took it for an oil change and added MMO to the oil and now is seems to be leaking more (dealer said there was an minor leak at the time). I also give the engine bay a wash. Anyways.. the oil is leaking faster now.. Noticeable spot on the asphalt. Tempted to replace the seals etc.. but wanted to try the oil dyes. ASny brand recommendations? UV required or can naked eye spot it? Can you run it in the oil until next change or better to dump the oil. Car is a beater status at this point, maybe better to leave it be.