2000 Isuzu Rodeo Question No oil on dip stick?

My Rodeo has a mild dent in the oil pan but no leaks anywhere I can notice nor is it burning oil. I changed my oil and added 4 quarts then another quart a couple weeks later. I checked my dip stick each time but I could not find any oil on it? Usually when I check A dipstick I can clearly see a thick layer of oil where it should be, but on mine it's almost impossible to see. Is there something wrong, or can I just not read my dipstick?

No, the oil light hasn't ever came on