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1. Toyota 1JZ/2JZ...
Sports cars sound like the least likely place to find a reliable engine, given that they get driven hard, placing more wear on the motor. But the Mk IV Toyota Supra disproved that with its 2JZ engine and variants thereof. This legendary 3.0-liter inline-six had a cast iron block and an aluminum head and was known to be bulletproof. Tuners have squeezed out close to 1,000 horsepower on stock internals, reliably so, and for those left stock, standard maintenance is all it needs to keep on clocking hundreds of thousands of miles.
The 1JZ also deserves mention - the 2.5-liter version of the JZ inline-six that spanned 17 years. Outputs ranged from just 168 hp in naturally aspirated versions of these motors to thousands in highly tuned and built versions. But in almost all scenarios, the JZ was as bulletproof as they come.
Follow Ups:
They die.
If/when an owner needs to replace the engine, if he/she buys a reman from Jegs, he/she gets the choice to have AFM deleted.
The newer LT engines with Dynamic Fuel Management might be even worse.
The blissful counterstroke-a considerable new message.
Edits: 06/11/24
Naa, not really. The only real problems I have seen are collapsed lifters which really are not difficult to replace. Also the VLOM can work loose over time and leak oil. They are pretty durable overall.
This being said I would put the Buick 3800 first for GM engines. And where is the Jeep 4.0 I-6 engine? I have seen more of those with well over 200K miles and still going strong.
Edits: 06/11/24
even I knew about the GM 3800, it is so famous, and I am not a gearhead by any means, just a curious guy among a world filled with cars who, perhaps, has been to one too many car events. .
Another good one was the four cylinder used in the old triumph and MG sports cars, up to about the seventies. . It was originally used in farm tractors , I think designed in the thirties, and developed such a reputation for durability, that it was selected and just hopped up a bit for sports car use.
England got hit hard by WW2, part of the reason for the famously crummy electronic parts was they had low money, and cheap stuff was easier to sell, and afford to build, in the home market This economic reality prompted the farm tractor motor to be put into a sports car.
...was designed to be used as water pump for fire engines. It didn't need to warm up, it was lightweight, Colin Chapman put it in race cars.
And road cars, too.
The blissful counterstroke-a considerable new message.
I think it was given an "honorable mention" in the article.
I think there was one of those engines in the '88 Jeep Comanche pickup I used to own. The rest of the truck was not built to the same high reliability standards, I guess. The paint job was lousy and the manual trans went out before the engine ever complained.
Lousy gas mileage yet slow, but pretty reliable.
I believe that is the same engine I had in my 96 Grand Cherokee. I still had it in 2011 and the Joplin tornado took it out. It was still running great with zero problems except for an O2 sensor easily replaced
By then, it's new engine time.
They also burn oil big time. My neighbor's 2014 Sierra has the Gen IV and the problems started with a trickle, turning into a cascade.
The Buick 3800, that whole engine family going back to the aluminum 215 is one of the greatest.
The blissful counterstroke-a considerable new message.
Can't happen due to collapsed lifter. The only way it can affect the cam lobe is for the roller to come apart on the base of the lifter. Very rare around here as I have only seen that happen once or twice at the most.
As far as being an oil burner I can agree. The first mistake people make on the older ones is using synthetic oil which burns off at a much higher rate than conventional oils. Another is people let the engines gunk up with carbon which affects the PCV system, which builds crankcase pressures, which lead to oil burning/leaking. Put a vacuum gauge at the valve cover direct vacuum line and watch the needle. It should be STEADY and not have the rapid fluctuation indicating excessive carbon buldup.
It's diabolical.
Although, I've owned more than a few that deactivated cylinders on their own, without any electronic help. Heh.
The blissful counterstroke-a considerable new message.
Edits: 06/11/24 06/11/24
It's kind of a joke really. I went to a GM training course when the AFM lifter system came out. IIRC there is a 15 percent fuel gain at highway speeds IF ALL parameters go just right for system to work properly.
Ok 15 percent of 18 MPG is not much savings. Certainly not enough for the average driver. Maybe for a fleet service it's fine though.
Minimal fuel savings to the car owner, but every tenth of a mile per gallon gets GM to the CAFE goal.
Of course, if they weren't so intent on selling mammoth gas guzzling vehicles in the first place, they wouldn't need garbage like AFM.
The blissful counterstroke-a considerable new message.
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