Nigel Elliott, spokesperson for the FBHVC warned drivers could see issues develop on their vehicle “over time” as a result of repeated exposure. He warned incompatible classic car hoses may start to “swell” if the wrong petrol is continually used.
However, he warned drivers should not see any “longer-term effects” if they only use E10 fuel now and again.
Mr Elliott warned ethanol generally “takes time” to start damaging the structure of key parts.
Speaking on the MG Car Club podcast, Mr Elliott was addressing general concerns about E10 fuel in classic cars.
He said: “Certainly, the odd fill of E10 is not going to cause any harm.
READ MORE: Classic car expert addresses E10 fuel issues
“Typically, you will see it start to swell.”
In the interview, Mr Elliott also warned the new petrol could separate, creating a “corrosive mixture” in vehicles.
Although, he warned this was unlikely if drivers had a “well-maintained system”.
The RAC has previously warned putting E10 in an incompatible vehicle could result in damage due to bioethanol’s “corrosive properties”.
They added the fuel could cause “condensation in fuel tanks”, especially if the car is “unused for long periods of time”.
Classic car experts at Hagerty Insurance have also warned “hundreds of thousands” of vehicles could be damaged.
They warn ethanol can absorb water from the atmosphere which may crusade corrosion of brass, copper, lead, tin and zinc.
Tests from the Department for Transport identified “problems” with the new mix.
They warned the new petrol could cause degradation to fuel hoses and deals of incompatible vehicles.
Blocked fuel filters, damaged fuel pumps, corroded carburettors and blocked injectors were also found in the assessment.
The RAC has previously estimated around 600,000 cars on the road are incompatible with the new fuel.
Generally, cars built before 2002 are not advised to use E10.
However, E10 compatible parts were only mandated in cars from 2011 meaning many modern vehicles may also be affected.
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