427Z06, I've only put 302 miles on the Mobil 0W-20 in my 04 DTR Marauader. The OD now reads 1864. I've been driving the Q45 with the Amsoil 5w30 in it. I tring to pick one of three oils for spring 1)Redline 2)Neo, since a member here suggest that in his opinion these are the best and the last (flame suit ON) Synlube.
Btw, forgot to mention my guy across the street stopped me Friday and he just got his 01-02 Harley Davidson F-150 back. Said he was at a stop light and it "grenaded" on him. It has 51600 miles on it. He thought someone was shooting at him, the dealer said a sparkplug backed out of one of the cylinders. He had the extended warranty so they replace the engine.
So yes I'm concerned.