The Weatherproof Polyester Laser (LP) is actually the same material as our White Weatherproof option for custom printing. The polyester based material is very durable and the material itself will not break down when exposed to oil. Although it is possible that the toner from your laser printer may react to the oil and cause discoloration, so samples would be recommended. You are welcome to request free samples for testing with your printer by visiting the link below. https://www.onlinelabels.com/samples