When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
It raises the octane rating level slightly which is always a good thing, but I would of thought it would be better to have the car mapped on v power only and if you have a bad tank of fuel, or really hot weather or both, the OB then can help protect the car, giving a safety margin, imho.