Is it necessary to add additives when switching to ethanol gasoline?
2 Answers
Switching to ethanol gasoline does not require additives, as most vehicles can use E10 ethanol gasoline. E10 ethanol gasoline is a blend containing 10% ethanol, which helps reduce exhaust emissions. In regions where the China VI emission standard has been implemented, China VI gasoline, which contains 10% ethanol, is already being supplied. There are two common types of fuel additives: one for cleaning the fuel system and another for removing carbon deposits. Ethanol gasoline is a new alternative energy source formed by blending fuel ethanol, processed from grains and various plant fibers, with regular gasoline in a specific ratio. As a new type of clean fuel, ethanol gasoline is a key focus in the development of renewable energy worldwide. It aligns with domestic energy substitution strategies and the direction of renewable energy development, is technically mature, safe, and reliable, and is fully applicable domestically, offering good economic and social benefits.
I specifically asked an experienced mechanic when I switched to ethanol gasoline with my old Jetta. He said that for cars under ten years old, additives are generally unnecessary because ethanol gasoline itself has cleaning properties. However, older cars with significant carbon buildup in the fuel system need to be cautious—suddenly switching to ethanol fuel might dislodge years of sludge and clog the fuel injectors. My neighbor’s 2003 Passat stalled right after switching and later cost over 800 yuan to clean the fuel system. He advised that older cars should get a fuel system cleaning before switching or use a cleaning additive for the first three fill-ups as a transition—it’s much cheaper than repairs. Now that I drive a new car, I don’t bother with additives at all.
