I would say either one is good to help with fat loss . I mostly use flax , BUT now I am kinda broke and I can get olive oil almost for free so I am using it now
OH and you CAN'T heat the olive oil OR ELSE the fat WILL SATURATE and it will become SATURATED FAT - TERRIBLE
all the good bros above have given good advice
i suggest mainly fish/flax combo (omega3's) to suppliment
you should be getting enough 6 and 9's from your food intake
do not totally eliminate saturated fat
like buddy anthax mentioned a certain amount of saturated fat is needed in T production
mct's are great to help you get into ketosis/lyposis
suggestion for weight loss is to make sure your fat caloric intake is 60+%
and not too much protien
and for gawds sake eat your fiber....esp raw veggies
if you need recipes for dishes seek out my thread on the muscle food discussion board
cheers