My apologies if this topic has been talked about. I looked and there seems to be some conflicting info. and would like to take a fresh look at it. Get it a little more concise.
My understanding is oil changes for GDI engines depend on factors such as gas dilution, usage, miles (city/highway/mix), type of car, etc... The manual seems to be simply a guideline. I read it as "up to X miles", not "at X miles" get it changed. The oil results can only be ascertained by proper testing and it's upon the results that we make our determination. Maybe an oil sniff test would be good for gas? Would you say each vehicle is used in a different manner (some tow, main city driving, main highway driving, drive like a maniac) and that we should test it every so often to see how our engines are doing instead of a 1 size fits all approach such as every 5k miles or 7500 miles?
If the add pack and TBN are still good after 7k miles with no signs of increased wear which is indicative of many tests I've seen, then why change to a lower OCI for GDI? GDI is expressed as "harder on engines" but wouldn't a proper oil take care of any shortcomings?
2019 Kia Sorento 2.4l GDI. PP 5w20 in the Winter and 5w30 Summer.
My understanding is oil changes for GDI engines depend on factors such as gas dilution, usage, miles (city/highway/mix), type of car, etc... The manual seems to be simply a guideline. I read it as "up to X miles", not "at X miles" get it changed. The oil results can only be ascertained by proper testing and it's upon the results that we make our determination. Maybe an oil sniff test would be good for gas? Would you say each vehicle is used in a different manner (some tow, main city driving, main highway driving, drive like a maniac) and that we should test it every so often to see how our engines are doing instead of a 1 size fits all approach such as every 5k miles or 7500 miles?
If the add pack and TBN are still good after 7k miles with no signs of increased wear which is indicative of many tests I've seen, then why change to a lower OCI for GDI? GDI is expressed as "harder on engines" but wouldn't a proper oil take care of any shortcomings?
2019 Kia Sorento 2.4l GDI. PP 5w20 in the Winter and 5w30 Summer.