1. Most dealers only do oil changes etc on the weekends
2. Loaner car is not standard
3. Normally you would make an appointment for service, assuming your car still runs/drives
If they find out you did OPG they could void your stage 1 warranty. Go stage 2, the tune is much better.
Also the first thing I would be worried about is the transmission and they only cover $2,000 towards that repair
Now, I'm not saying that you should use oil additives, but I am saying the owners manual isn't the best guide.
Remember, this is the same owners manual that says to use 0W-20, and that you shouldn't change the transmission fluid or filter for 150k either...
Cold starts sound so terrible, I don't know how so many people in the community got to the point of posting them and jerking off to them like it sounds good.
12-15% on a modern RWD car, not 20%. That would be more like an AWD car or an old RWD with a TH400 and a big converter. Drivetrains are a lot more efficient these days.
429hp
480hp stock, add 5hp for the Borla like you would get with the Active Exhuast
That's 11% drivetrain loss, so that's pretty close. Underrated by 3%? Remember a lot of S550/Gen 3 coyotes also dyno in the 410's and 420's
Dynocoms usually read a little high as well.
Don't forget there are different qualities of all of those types of wheel construction...
I've had cast wheels that bent easily, and then I've had ones where you could break a concrete curb and only scuff the wheel.
OEM cast wheels are usually (but not always, cough cough second gen Mitsubishi...