LS600h L hybrid is a technological marvel but only gets a little better mileage for a lot more money.

Toyota

Let’s face it, rather than sacrifice, we want to save the Earth at our convenience. Thus, the rise of the gas-electric hybrid car, which allows us to continue driving large vehicles while consuming less fuel.

Like other Toyota hybrids, the Lexus LS600h L hybrid sedan runs on electricity only at low speeds and light load conditions. As speed increases, the gasoline engine and two electric motors run in tandem. At highway speeds, the gasoline engine does most of the work; the electric engine rarely gets involved. When you come to a stop, everything shuts down, restarting instantly upon accelerating.

There’s even a dash-mounted switch that allows the car to run solely on electricity, as long as you don’t drive more than 20 mph, or go far. If you do, the gas engine comes on.

Rather than use the 380-horsepower, 4.6-liter V8 used in the non-hybrid LS460 L, the LS600h uses a larger five-liter V8 coupled with electric motors to generate a combined 438 horsepower. To compensate for the extra power, the hybrid exchanges the LS460’s eight-speed automatic transmission for a continuously variable transmission, which constantly varies the gear ratio for improved fuel economy.

The results are enjoyable, if you prefer an isolated driving experience, one that insulates rather than involves the driver. There’s little difference in feel between hybrid and non-hybrid LS models, except for the hybrid’s somewhat touchy brakes. The sensitivity comes from the brake design, which captures energy during deceleration. That energy recharges the electric batteries, as does the gasoline engine. The car never has to be plugged in.

Like every Lexus, the LS is a paragon of refinement. Everything on the car is dampened and quiet, pampering occupants in lavish splendor.

Because it’s the most expensive Lexus offered, features that are optional on lesser LS models are standard on the hybrid. Still, there are some options. The test car has a $7,570 Premium Luxury Package, which adds reclining rear heated and cooled seats, rear sunshades and a DVD entertainment system with wireless headphones.

For $2,850, Lexus adds adaptive cruise control, which uses lasers to automatically measure following distance. Standard gear includes a keyless entry and ignition system, Bluetooth compatibility, voice-activated navigation and a Mark Levinson sound system.

I could fill the page discussing the car’s features. The bottom line: The car is Toyota’s technological triumph. Sadly, it’s not perfect.

For example, the hybrid’s battery pack usurps cargo space, leaving just 11.7 cubic feet, meager considering the car’s 16.8-foot length.

And let’s not forget the car’s stated mission: fuel economy.

The LS600h L has a combined city/highway fuel economy rating of 21 mpg, just two mpg more than the nonhybrid — but otherwise identical — LS460 L. The hybrid returned just more than 21 mpg in mixed use, 5 mpg less than the five-inch longer, but less powerful, Cadillac DTS.

Now, consider the LS600h L’s $104,000 base price, which is more than a LS460 L and Toyota Prius combined. It gives this car the appearance of being a high-priced fashion statement rather than being a true green machine.

But one can’t argue with the technological mastery that Lexus has wrought with this profligate sedan. In a status-driven world, it offers hybrid panache and, aside from trunk space, asks no sacrifice on the part of those who can afford it.

Lexus LS600h L hybrid sedan

What we say: Toyota’s technological triumph

Pro: Every bit an opulent car

Con: Unconvincing as a fuel-sipper

Stats

Engine: 5-liter DOHC V8 and two electric motors

Wheelbase: 121.7 inches

Length: 202.8 inches

Weight: 5,049 pounds

Cargo space: 11.7 cubic feet

EPA rating (city/highway): 20/22 mpg

Fuel economy: 21.3 mpg

Fuel type: Premium unleaded

Base price: $104,000

As tested: $115,412