wemay
Site Donor 2023
Been using 87 octane from various stations with the Sonata. Last week i filled the tank with 16 gallons (full tank is 18.4). I didn't notice immediately because of the radio but the following day i could hear a faint ping on acceleration. This began to worry me of course but before going to the dealer, I decided to use up this tank-full and fill up somewhere else. I did so at another major chain and thankfully, the ping completely went away.
Q. What, in the old gas, would cause the engine to ping?
Q. What, in the old gas, would cause the engine to ping?