Nigel Elliott, fuel specialist at the Federation of British Historic Vehicle Clubs (FHBVC) warned of the dangers of keeping a full petrol tank in classic cars this winter. He added it was “always handy” to leave a bit of space in the tank if drivers store their historic vehicles for the winter.
He said motorists could then “splash in a bit of fuel” after winter instead of running on old petrol.
He said: “There have been many debates on laying up cars and what’s the ideal thing to do.
“Keep the tank at least two-thirds full, obviously exposure to air and oxidation and water ingress from humidity changes.
“But also the danger is on a completely full tank, when you come to start the vehicle you’ve lost some of the lighter ends of the fuel.
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Ideally, drivers should instead consider draining their fuel tanks completely before storing away for a long period of time.
Malcolm Mckay, spokesperson for the HCVA, warned leaving fuel in tanks could be a “corrosion” risk.
He said: “Corrosion will take place inside a half-empty steel fuel tank whatever the fuel used if left standing for months in a humid atmosphere.
“It is best to brim the tank before short-term storage and to use ethanol-free fuel if possible or at worst E5, with the anti-corrosion additive.
When it comes to storing a car, they recommend adding some additives to limit the risk of damage.
For models built before 1996 without a catalytic converter, they recommend Castrol’s Classic Valvemaster.
This contains an ethanol stabilizer which can help to prevent corrosion.
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