I change my oil every 5k so fuck it. I can probably run shit oil and still be ok
I'm going to do 5k OCI as well.
Recent research has shifted my attention and concerns towards our GDI engine being vulnerable to Carbon Build Up on the Valves.
It doesn't seem we can do much about it.
Liqui-Moly LHT 5W-40 has SAPS rating @ 1.2% and NOACK rating @ 9.6%. Based on my research, a good oil for GDI engines would have <0.7% SAPS / <9% NOACK ratings. The SAPS on LM is a bit high.
I got back a reply via e-mail from Liqui-Moly. They recommend Fuel Injection Cleaners every 1,200 miles, Engine oil flush every 20,000 miles, and throttle valve cleaner every year. They also suggested I stick with LHT 5W-40.
So, I'll stick with the same oil and do the following. I'll add Fuel Injection Cleaners every other oil change. I'll do a engine oil flush and throttle valve cleaner while doing my full service @40,000 miles. I'm considering doing the Italian tune up every now and then on 91+ Octane as it supposedly helps.
I'll probably consider walnut blasting the valves @ 80,000 miles. Other than that... best option would be to trade it in for a Ford Mustang GT... as it is set up with port and direct injection.