Preheat oven to 375ºF and line a 9- x 13-inch pan with parchment paper.
In the bowl of an electric mixer (or in a regular bowl, beating very hard to achieve the same results), cream together oil and sugar until fully combined and creamy.
Add vanilla, corn syrup, and oats. Add additional corn syrup if mixture seems to dry to combine well.
Flatten mixture into an even layer in prepared pan. Bake for 13 minutes. Let cool slightly.
Melt chocolate chips with peanut butter and mix to combine. Spread in an even layer across the top of the bars. Let firm before slicing. Try not to eat the entire pan without sharing!
Recipe by Between Carpools at https://betweencarpools.com/ohenry-bars-wed-sneak-mothers-freezer/