Well........ As the person selling it, all i have heard are good reviews. Ultimate is 98 at minimum, closer to 99. The stuff has four times the detergents than regular fuel which means it cleans your engine and prevents build up, also anti-corrosion. Just for that i'd put it in my car. I think one of the main causes that produced the knock in my car that lead to the detonation on the way back from Devonport was because of the fresh tank of PULP after running it on 98RON in Melbourne