Etha-Guard - The ethanol solution

In September 2021, standard 95ron petrol had its ethanol content increased from 5 to 10% (E5 to E10 respectively). There are around 1 million cars on the road not approved for E10, as well as a significant number of motorbikes and scooters. A large number of modern classics are not approved for E10.

Etha-Guard is an additive that counteracts ethanol’s hygroscopic nature, preventing moisture and subsequent acidity in your fuel system. Etha-Guard protects both in use and in storage, stabilising the fuel to prevent moisture absorption and separation.

All products in the Valvemaster Fuel Additive range contain Etha-Guard. Classic Etha-Guard Plus is available as a stand-alone ethanol stabiliser; compatible with catalytic converters, it can be used by owners of younger classics and E10 non-compatible modern vehicles who do not require valve seat protection.