> I am not sure if you wanna go into discussing Diesel engines now, especially with all the engine software problems when it comes to AdBlue, and when it comes to Dieselgate, which, by decision of all involved courts, was malice.
I mentioned the ALH TDI from the MKIV Golf/Jetta only, which is a legendary engine, with a ton of them having now reliably reached half a million miles with no major work required. This long predates the dieselgate cars, and adblue was never used on the 4 cylinder VW diesels anyways.
As an aside, yes dieselgate was intentionally criminal, but was sort of the opposite of a quality issue. VW couldn't figure out how to get their engines to work reliability and drive well with current technology at the time and still meet emissions requirements, so they cheated. They had to fix them (I own one) and they are still good, but not as good as they were before the fix- worse fuel economy, less reliable, excessive adblue consumption (in 6cyl models). The ethical thing to do would have been to pull all of the diesels from the market instead, which is what many of their competitors did at the time. Passenger car diesels in the USA are effectively dead because the emissions requirements render them less practical than gasoline cars.
VW had serious quality issues in the 90s that weren't strategic, but were actually causing their company to lose its reputation and nearly collapse. They turned it completely around when Ferdinand Piëch started running things- they were arguably making the highest quality cars at in the world any price point during his tenure as CEO. The quality of current VWs has now fallen back down again, even lower than the 90s cars unfortunately.
I bought a 2013 Passat TDI, one of the dieselgate models, after they completed the recall repairs. I thought I was getting a great deal at the time. Unfortunately, the “fix” seemed to cause some other issues, at least in my case. I religiously used Liqui Moly certified low-ash oil, and kept up with the maintenance schedules. Even still, the turbo wore out at around 100k miles and had to be replaced, and then the new one was exhibiting the same symptoms only ~20k miles later, and would likely have eventually given up as well if the car hadn’t been totaled before it got to that point. Cold weather would cause it to run like dogshit until everything got up to operating temps, and then it would usually run fine the rest of the day. The fuel economy was also never quite as good as I expected, it always struggled to get better than 35mpg.
My mechanic told me that engine was really poorly suited to city driving, which was a lot of my activity, and short trips caused an inordinate amount of carbon buildup, which he cited as the cause of my cold weather performance issues. Anyway, I think it’s probably a great car for folks with a lengthier commute. I learned my habits and routines were likely murder to a TDI engine, but especially those dieselgate models.
Yeah, they do survive better with more long distance driving, but ultimately the newer common rail diesels are complex, fragile, and inefficient compared to the old TDIs. They succeeded in getting the emissions much cleaner, especially after the court mandated retrofit, but at the expense of everything else that made them economical and practical. I could get 60mpg in my 2000 TDI golf with a 6 speed manual.
I mentioned the ALH TDI from the MKIV Golf/Jetta only, which is a legendary engine, with a ton of them having now reliably reached half a million miles with no major work required. This long predates the dieselgate cars, and adblue was never used on the 4 cylinder VW diesels anyways.
As an aside, yes dieselgate was intentionally criminal, but was sort of the opposite of a quality issue. VW couldn't figure out how to get their engines to work reliability and drive well with current technology at the time and still meet emissions requirements, so they cheated. They had to fix them (I own one) and they are still good, but not as good as they were before the fix- worse fuel economy, less reliable, excessive adblue consumption (in 6cyl models). The ethical thing to do would have been to pull all of the diesels from the market instead, which is what many of their competitors did at the time. Passenger car diesels in the USA are effectively dead because the emissions requirements render them less practical than gasoline cars.
VW had serious quality issues in the 90s that weren't strategic, but were actually causing their company to lose its reputation and nearly collapse. They turned it completely around when Ferdinand Piëch started running things- they were arguably making the highest quality cars at in the world any price point during his tenure as CEO. The quality of current VWs has now fallen back down again, even lower than the 90s cars unfortunately.