By how much does TetraBOOST increase the octane rating?
Mixing the required amount of TetraBOOST with unleaded pump fuel to create 4 star leaded petrol increases the octane rating by 2 points. Therefore, mixing up leaded 4 star from ordinary unleaded (95 octane) will give you 4 star 97 octane. If you start with super unleaded (97 octane) this will effectively give you 4 star + 99 octane. Many customers make up 100 octane mixes for higher performance applications. TetraBOOST is capable of raising the octane up to 106 for specialist race engines. Remember that stronger concentrations do no harm to your engine. TetraBOOST recommends Shell Optimax for high octane mixes for race use.