Originally Posted by buster
Originally Posted by ChrisD46
I have used Castrol Magnatec 5W30 D1 / Gen 2 oil and it is a decent oil .
My pick for a GDI synthetic oil goes to Valvoline 5W20 or 5W30 Advanced Synthetic D1 / Gen 2 oils due to low NOACK , very low VII's and great ad pack - suggest an OCI of no more than 5K miles using Fram Ultra oil filter..
Along with above oil my GDI engine regimen is :
*Use Top Tier Gasoline
*Use CRC Intake Valve Cleaner every 12K miles (relatively easy to do)
*Keep PCV clean (or replace regularly)
*Change spark plugs out 10K to 15K miles earlier than OM suggests
*Use Techron Complete Fuel System Cleaner right before every oil change (keeps injector spray stream consistent)
*Take vehicle out on the interstate for a 20 minute drive choosing a gear which provides a steady 3.5K to 4K RPM's at least once every 3 to 4 weeks
Good plan. Chris, 3k-4k rpms for 20 minutes straight? That will certainly get the oil and engine nice and warm, which is what you want.
Mazda found carbon deposits build up when the temps fall below 400C.
*Most of my driving is around the suburbs , so to get out on the interstate to get some steady revs up once in a while is not a bad thing . I also drive the Sonata with GDI engine in "Sport Mode" to keep the revs up a little higher and shift points higher ... The worst thing you caan do to a GDI engine is lug the engine and not get the engine hot enough to keep carbon off of the intake valves .