BTW-
For those determined to go 20K on an oil change I would suggest the following:
1-Start with either AMSOIL or M1 Extended Peformance oil-the 15 K stuff
2-Change the oil filter at 10K. Also make sure you use either OEM or M1 filter or similar long life filter.
If you do not need to add oil frequently during the 20K period (lucky for you), reconsider this whole 20K strategy!
As you know, I don't recommend the above but if you are determined, the above should keep you in good stead!
