If the oil darkens the counter and you like the look use stone color enhancer to make it permanent.
Change the color of granite countertop.
You can use granite counter top sealer to change the color of the granite but there are sealers that will not change the color of your granite if you do not want it changed.
Updating granite countertops using paint.
If your countertops are not properly sealed the oil may stain.
I d change up other elements in your space make the black granite work.
Apply a small amount of baby oil to a clean white rag.
The photo of the kitchen was to show that the painted counters ended up about the same color as the kitchen quartzite instead of the brown black beige colors they were.
Rub it over the lighter spot or a portion thereof.
This will immediately absorb into the granite not having an effect on the color.
Tackle the countertop without replacing it.
That way at least your outdated granite colors won t be fighting with the floor or the walls.
If it currently has a matte finish as opposed to a polished look try a color enhancer sealer.
You may be able to change the look of your countertop somewhat by sealing it.
Food and liquids left to sit too long can stain the granite and change its color especially if.
Etc i m saving my pennies to be able to change them to wood look tile.
If you must cover with something there is a product called granite transformations they install another countertop right over top of your granite with recycled granite or glass many colours to choose from its expensive thought so not really economical that way and its permanent because you have to stick glue or screw it into granite to safety.
It will not adhere and if you do not like the color think about changing the wall color or even the cabinet color to change the look of the granite and compliment it more.
With normal use and proper care they re impervious to heat and staining.