I dont think anybody Warms there car by letting it sit there for 10mins
My GTST is a daily driver into perth and weekends (Love it too much)
I have Expencive oil (Motorbike to be exact) good $80 a bottle
I start it up wait about 10secs then start to back it out. When im driving to work I dont go over 3,000 most changes are around the 2,000 or 2,500 but when she warms I have fun