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Should I fill the petrol tank of my classic car prior to winter storage?

Should I fill the petrol tank of my Mk1 Mazda MX5 prior to winter storage?

Asked on 18 February 2019 by Russell Andrews

Answered by Keith Moody
It's a good idea to top up the tank of your car before mothballing it (especially if you're not going to be able to run it up to temperature on a regular basis). The thinking is that it prevents opportunities for corrosion in the tank - although the high ethanol content in modern fuel causes its own problems as the fuel can split, which has a knock-on effect on various pipes and connectors. This takes about six to eight weeks to happen so consider adding an additive to your tank to prevent this.
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