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“Battery EV” vs “Hydrogen Fuel cell EV”

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Miyuki:

--- Quote from: james_s on November 17, 2021, 09:13:42 pm ---
--- Quote from: Miyuki on November 17, 2021, 08:25:53 pm ---Yeh cars under 10s tend to be considered "fast"
I have a wagon with old 97 hp diesel with 4-speed auto that is a rocket, I can feel like and race driver, half the way on full throttle  >:D
But it gets over 1000km on a full tank
They used to be consedered green back then because of so low fuel consumption

--- End quote ---

My friend had an old VW Golf diesel I drove a few times, I think it was a 1983, no turbo, I remember the gas pedal was pretty much binary, you either were sat at a stop and not touching it at all, or you had it held to the floor and were waiting patiently for it to get up to speed before having to stop at the next light. I'm still a fan of diesels overall, the low fuel consumption and high torque of a turbo diesel is a winning combination. We never got many of them in cars here though.

--- End quote ---
Wikipedia says they used to put 1.6 non-turbo diesel with whopping 52 hp  :-DD
That must be something

james_s:

--- Quote from: Miyuki on November 18, 2021, 05:34:58 am ---Wikipedia says they used to put 1.6 non-turbo diesel with whopping 52 hp  :-DD
That must be something

--- End quote ---

That sounds about right. They were certainly not sports cars, although they were very light compared to modern cars so they weren't *quite* as slow as 52hp sounds, but they were still slow. They got great fuel economy for the era too.

tom66:

--- Quote from: SiliconWizard on November 17, 2021, 09:11:39 pm ---Someone owning a Golf GTE probably has some requirements in terms of performance that your average Joe does not.

--- End quote ---

Fastest car I ever owned, but it was a present to myself once I finally was able to afford a "reasonable" used car.  Used to drive a 206 2.0 HDi diesel (~90 hp turbodiesel), not a bad car as a student, but the accelerator on that was more like advice to the ECU that at some point in the next 10 seconds you wouldn't mind if you could go a bit faster, please.

ejeffrey:

--- Quote from: james_s on November 17, 2021, 04:46:36 am ---
--- Quote from: Miyuki on November 16, 2021, 07:12:30 pm ---Today is common to have a 1.0 turbo with an even higher power, in the car this size
Plus oil change interval is set mostly for 40,000km (25,000 miles) to lower maintenance, it is proven to damage engine, but fleet customers want it as they don't keep cars that long and for example, in Europe, it is a big part of the market, a big portion of people here have the car as an employment benefit

--- End quote ---

That's crazy, I change my oil pretty religiously at 5,000 miles and have always run full synthetic in my turbo cars. Even at today's prices oil is cheap when compared to the price of an engine rebuild or new car.

--- End quote ---

My understanding is that 20000 mi is actually probably fine for full synthetic oil in most engines and 5000 mi is total overkill (at least after the break in service).  The main problem is the oil filter not the oil itself which can break down over time depending on conditions.  If you go to a shop it makes sense to change both but if you just do it yourself changing out the oil filter and topping up the oil is fine, only draining the oil much less often.


That said, even with long oil change intervals I have never heard of claims that engines, even small turbo engines generically require piston ring replacement on any time table.
 Head gasket failures are also not normal.  Certain models and brands may be known for pattern failures in either.  I think at one point Audi was saying that consuming 500 ml of oil every 3000 miles was "acceptable." As a whole however it isn't a standard thing.   Most modern car engines will go hundreds of thousands of miles without any service requiring removing the cylinder head. 

nctnico:

--- Quote from: ejeffrey on November 18, 2021, 04:38:53 pm ---
--- Quote from: james_s on November 17, 2021, 04:46:36 am ---
--- Quote from: Miyuki on November 16, 2021, 07:12:30 pm ---Today is common to have a 1.0 turbo with an even higher power, in the car this size
Plus oil change interval is set mostly for 40,000km (25,000 miles) to lower maintenance, it is proven to damage engine, but fleet customers want it as they don't keep cars that long and for example, in Europe, it is a big part of the market, a big portion of people here have the car as an employment benefit

--- End quote ---

That's crazy, I change my oil pretty religiously at 5,000 miles and have always run full synthetic in my turbo cars. Even at today's prices oil is cheap when compared to the price of an engine rebuild or new car.

--- End quote ---

My understanding is that 20000 mi is actually probably fine for full synthetic oil in most engines and 5000 mi is total overkill (at least after the break in service).  The main problem is the oil filter not the oil itself which can break down over time depending on conditions.  If you go to a shop it makes sense to change both but if you just do it yourself changing out the oil filter and topping up the oil is fine, only draining the oil much less often.


That said, even with long oil change intervals I have never heard of claims that engines, even small turbo engines generically require piston ring replacement on any time table.

--- End quote ---
From what I understand the main cause of piston rings getting stuck resulting in oil use is not letting the engine work enough (*). Direct injection gasoline engines seem to be specifically prone to this problem. I have driven several cars over 320k km / 200k miles but never had to have an engine rebuild or experienced excessive oil use. Far from it. But then again, I do my homework before buying a car in order to avoid cars with expensive problems. And I let the engine work every now and then.

* From several mechanics I've read that replacing the rings isn't necessary in many cases, just fill the cylinders with diesel and let it soak for a day or so to dissolve the dirt and then flush for a final clean.

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