By varying the RPM on your drive home, you did more to aid the proper wear-in of a new engine than most people would likely do. Also, engines are run at the factory before installation in the vehicle, and then run in the vehicle for at least a few miles more. So the majority of break in has been done already, now it's just the super fine polishing that happens in your hands. Avoid full throttle drag-race starts, hard braking, etc. All inputs should be moderate (less than or equal to 70% of maximum) for the first 500 miles. Then have a go and don't worry.We purchased a new 2020 Jetta 1.4 TSI this past Saturday. We had to drive 2 hours home so the engine hovered around 2K rpm most of the drive home. I changed it up every 30 minutes or so dropping it down to 7th or 6th gear to vary RPM. But this was still all at highway speed. Is this something to be concerned about? We have another 2 hour trip next weekend, should we not use the Jetta for highway travel until its fully broken in?
This is all new to me, I have never had a new car during the break in period. Some of these 1.4 TSI's use oil, I don't want to help get there any sooner.
By varying the RPM on your drive home, you did more to aid the proper wear-in of a new engine than most people would likely do. Also, engines are run at the factory before installation in the vehicle, and then run in the vehicle for at least a few miles more. So the majority of break in has been done already, now it's just the super fine polishing that happens in your hands. Avoid full throttle drag-race starts, hard braking, etc. All inputs should be moderate (less than or equal to 70% of maximum) for the first 500 miles. Then have a go and don't worry.
Odds are the lot boy took care of the break in moving it around the dealers lot before you took title to it.