I agree. Most engines theses days last well past their warranty and most failures are caused by manufacturing defects, aftermarket modification, or neglect. Spending extra on designer oil isn't going to save your engine from failing if it was manufactured with defective parts or if you beat on it and change aftermarket parameters. Maybe it's piece of mind to some but at the end of the day it's just money wasted.Originally posted by Mitsu3000gt
These days, I am very much of the opinion that you will never see any negative effects over a vehicle's lifetime by using quality synthetic and regular change intervals, regardless of brand. I don't think there's ever been a case of "If Only I had used Amsoil or Royal Purple, X problem wouldn't have happened." Letting vehicles go crazy KM without oil/filter changes doesn't sit well with me, and voids warranty if you're on it.
Dealer bulk full-synthetic and manufacturer recommended oil change intervals is what I do. I have never, and don't expect to ever, have issues. Nor would I ever own a car long enough where oil-related issues would occur.
We always have two cars. My wife's is always dealer serviced at manufacturer intervals and I have always done my own always in shorter intervals and typically more expensive oil than dealer bulk synthetic or dyno oil. None of her cars have ever failed or had lubrication issues despite her cars always having higher mileage due to it being more of a family hauler.