The following information regarding engine oil recommendations was not created by me; it was created by a member named -X- over at the Veloster Turbo forums who has done a significant amount of research to find out what oil is best for our Gamma 1.6 turbo engines.
I asked for permission from him prior to posting this.
You can find his original thread which targets LSPI (low speed pre-ignition) prevention which affects all turbo GDI motors, not just ours. Feel free to do your research on the subject for the explanation as to why these oils are recommended.
LSPI Risk Minimization Tips and Research
The decision to use whichever oil in your own vehicle is entirely your choice
Owner's Manual Recommended Oil
Total Quartz 9000 5W30
Pennzoil Ultra Platinum 5W-30 *** Ultra Platinum, not just Platinum
PAO and Ester-based Oils
RedLine 5W-40 or 5W-30
Cerma 5W-40 or 5W-30
Cerma X 5W-40 or 5W-30
AMSOIL Signature 5W-30
Motul 8100 X-cess 5W-40 or 5W-30
Off-the-shelf A5/B5 Specification Oils
Castrol Edge SYNTEC 5W30 ***contains high amounts of magnesium which may cause excess wear on the turbo overtime***
NOT RECOMMENDED OIL
Mobil 1 Synthetic 5W30 ***there is proof on the VT forums that this oil can cause sludge in our motors... use at your own risk***
Forte Specific Information
The following section was created entirely by me, all photos were taken directly from the owner's manual.
***Please note for this section I only included the "Severe Usage Conditions" - I believe that we purchased a turbo car for a reason and spirited driving is inevitable. I recommend this schedule over the normal one but the choice is yours***