On my 11 Sonata, with the 2.4L GDI engine, I have had problems with pinging since I bought the car with 29k miles.
So, I have ran 93 octane costco gas at almost every fillup, and 3 OCI's with Maxlife 5w30 semi syn, at 3750 miles.
Also have been using chevron techron concentrate at every oil change.
A friend of mine was following me home from work, and said she noticed some black smoke from the tailpipe under hard acceleration. This is a tank of 93 octane that I had techron in, and currently running Synpower 5w30.
Since that day I have been able to run 87 octane top tier fuel with almost no pinging.
I'd say my schedule of techron and frequent oil changes is doing some cleaning in this GDI engine.
At the last oil change, the oil also did not smell like fuel at all, the first two smelled strongly of fuel.
So, I have ran 93 octane costco gas at almost every fillup, and 3 OCI's with Maxlife 5w30 semi syn, at 3750 miles.
Also have been using chevron techron concentrate at every oil change.
A friend of mine was following me home from work, and said she noticed some black smoke from the tailpipe under hard acceleration. This is a tank of 93 octane that I had techron in, and currently running Synpower 5w30.
Since that day I have been able to run 87 octane top tier fuel with almost no pinging.
I'd say my schedule of techron and frequent oil changes is doing some cleaning in this GDI engine.
At the last oil change, the oil also did not smell like fuel at all, the first two smelled strongly of fuel.