No! Low fat is usually based on some fictional number that companies invent to get you to buy their product. Most "low fat" items are still pretty high in fat but not as high as the original. Pretty sly huh?

Now lets look at origin Mayo. Original mayo is made up of 85% fat. And that fat is bad fat. So no original mayo.
How about low fat mayo? Low Fat Mayo has lots of starch to make up for the taste in the original mayo and still has around 5 grams of fat per table spoon.
So in conclusion, just cut the mayo.
Hope that helped.
Add rep if so.