Drivers have been issued a warning as we come into winter.
Problems with new E10 petrol are likely to become worse as the temperature drops, experts have warned.
Performance issues have been reported by drivers who are using the new greener fuel.
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The new E10 fuel is replaced the E5 grade petrol and will be the standard fuel across Scotland and the UK.
As there is a push to live a more sustainable life as COP26 rolls on, E10 contains a higher percentage of renewable fuel called bioethanol which means it is better for the environment due to the lower levels of carbon emissions it produces.
However, as the Daily Record reports, industry experts are warning that E10 could cause issues during the winter months - and it could even cause fuel lines to freeze.
SulNOx Group says water condensation found in E10 is more likely to freeze before it gets to the engine compared to petrol or diesel.
“In cold weather, condensation occurs when water vapour comes in contact with a hot surface," Dr Dan Clarke, Global Head of Science and Technology, said.
"This can happen in your fuel tank, as any space not filled up with fuel will be taken up by air containing water vapour.
“The main problem is that the additional bio-ethanol content in E10 prefers to mix with water as opposed to petrol and where there is sufficient of both, it leaves the petrol and combines with the water to form a separate layer at the bottom of the fuel tank.
“The fuel line then draws from this watery alcohol mixture which is pumped directly into the engine. Equally, while petrol or diesel are very unlikely to freeze in the temperatures we typically experience in the UK, water condensation left in the empty fuel lines can easily freeze and prevent fuel from reaching your engine.”
But despite it being better for the environment, road users have complained at E10 has had a negative impact on their car's fuel economy.
The energy is less "energy dense" meaning drivers may have to top up more than before - costing them more money in turn.
The RAC Foundation estimates more than 634,000 cars on UK roads are incompatible with E10 - 150,000 of those built from the year 2000 onwards.
Dr Clarke said: “The introduction of E10 in the UK is likely to have more of an impact on motorists than it has had in other countries which generally have a warmer climate.
Ben Richardson, CEO of SulNOx Group Plc, added: “Although the rollout of E10 is a step forward towards decarbonisation, the issues with the alcohol combining with water is effectively like producing vodka in the fuel tank."
