Drivers worry about E10 gasoline deadline

As Vietnam approaches the June 1 deadline to sell only E10 gasoline, many vehicle owners express anxiety and seek clarification on fuel options. Online forums are abuzz with questions about why E10 and traditional mineral gasolines like RON-95 cannot be sold concurrently, limiting consumer choice.

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the engine runs hotter, and is more sluggish.

While some drivers have tested E10 and found their vehicles run acceptably, albeit with slightly higher fuel consumption, others report issues. One user noted their SH150i scooter consumed 3-5% more fuel with E10, experienced increased engine heat, and felt sluggish. However, other users reported no adverse effects, with their engines running smoothly.

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do not use fuel containing more than 10% ethanol

The primary concern revolves around older vehicles, particularly those manufactured before 2010. While many newer cars and motorcycles, especially imported models, are compatible with E10, owners of older models need to confirm compatibility. This information is typically found on a sticker inside the fuel cap or in the owner's manual. Some manufacturers' warnings, like Kia's for the K3, advise against using ethanol-blended fuels if performance issues arise, noting that such damage may not be covered by warranty.

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discontinue the use of any ethanol-blended fuel if any problems related to vehicle performance arise. Damage to the vehicle or reduced performance will not be covered by the manufacturer's warranty.

An automotive expert suggested that such manufacturer warnings, while indicating E10 compatibility, serve to disclaim responsibility for potential warranty claims related to fuel-related damage. Ethanol, a solvent, can affect non-metallic components like gaskets and rubber seals. It also acts as a cleaning agent, potentially dislodging sediment in the fuel tank that could then travel through the fuel system.

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ethanol is a solvent that does not affect mechanical parts, only non-metallic materials such as gaskets, seals, and rubber.