(I only cook with extra virgin olive oil which I buy in 5L cans for $$ reasons. A lot of these vegetable oils are good for motor engines only!).
It really depends on you and the activity levels.
I used to ride to and from work - and I would ride hard, a solid 1.5 hour of riding every single workday. Yet this just caused me to gain weight as my appetite just shot through the roof. This new drug would have been SO good for me back then.
These days I find it easier to control my weight with regular strength exercise vs riding, as I tend to go too hard on the riding which causes me to feel famished. And then the control is just hard.
However when I just do (Olympic barbell) weights, a bacon, egg and onion + cheese omelette in real butter and EVOO does the trick to break my IF then, along with a WPI/milk shake- I get stronger and also lose weight. No need to keep eating. However, I'll then do cardio a couple of times per week which tends to undo the weight progress; I guess the real trick would be to stop doing the hard intervals I love on the Kickr, but going slow on the bike is nearly impossible for me. :-)
Maybe using too much oil in your food? It's got crazy calories.
Eat low calorie (and ideally high protein) after exercising. Fruit and Veg are amazing for this.