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They urge drivers to top up their tank with E5 as soon as possible, ideally before at least a third of the tank has been used.
RAC fuel spokesman Simon Williams said it was “vital” owners of older models were “aware of the changes”.
He has called for the DVLA to inform owners personally of the change and how they can ensure their cars are protected.
He said: It is also vital that owners of affected vehicles are aware of the changes.
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“We’d like to see the DVLA writing to these owners to inform them that E5 will no longer be the standard premium grade, and to let them know their options.”
E10 contains a higher percentage of ethanol which can cause damage to components in older vehicles.
Tests from the Department for Transport (DfT) showed E10 can lead to degradation of fuel hose and seals, blacked fuel filters and damaged fuel pumps.
Carburettors and fuel tanks can become corroded by the new fuel while a car’s injectors could also become blocked.
The ACEA report has urged drivers to make sure they check their vehicle is compatible before topping up their cars with the new fuel.
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The report said: “In countries that offer E10 petrol, before you fill your vehicle with petrol please check that your vehicle is compatible with the use of E10 petrol.