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2020 Nissan Maxima and Pathfinder Rock Creek | Autoblog Podcast #602

In this week's Autoblog Podcast, Editor-in-Chief Greg Migliore is joined by Consumer Editor Jeremy Korzeniewski and Assistant Editor Zac Palmer. This week, they've been driving the Nissan Maxima, Mercedes-Benz Metris Cargo Van, Mazda3 sedan and Nissan Pathfinder Rock Creek, and they talk about their experiences with those vehicles. Then, in the Spend My Money segment, they help a viewer from Autoblog's Twitch stream pick a used pickup. Autoblog Podcast #602 Get The Podcast iTunes – Subscribe to the Autoblog Podcast in iTunes RSS – Add the Autoblog Podcast feed to your RSS aggregator MP3 – Download the MP3 directly Rundown 2020 Nissan Maxima 2019 Mercedes-Benz Metris Cargo Van 2019 Mazda3 sedan 2020 Nissan Pathfinder Rock Creek Edition Spend My Money Feedback Email – Podcast@Autoblog.com Review the show on iTunes Related Video: This content is hosted by a third party. To view it, please update your privacy preferences. Manage Settings.

Infiniti's new VC-T changes the rules of small turbocharged engines

The upcoming Infiniti QX50 crossover does not get our pulse racing, no matter how shapely the QX Sport Inspiration concept that previews it may be. No midsize SUV does, to be fair. But it has something special under the hood – the world's first production variable-compression-ratio engine. That means the QX50's 2.0-liter turbo four, which makes 268 horsepower and 288 pound-feet of torque, will have up to 27 percent better fuel economy. Here's how it works. The trend of moving to smaller, turbocharged engines carries with it one big falsehood. Under low load when the turbo isn't needed, these engines are less efficient than an equivalent engine without a turbo because of the low compression ratio the turbo requires. That is, if you never need the extra power, you're wasting fuel. Turbocharged (and supercharged) engines use a lower compression ratio to prevent detonation. When you force extra air in a cylinder and mix it with fuel, it's more likely to prematurely go boom. Lowering the compression ratio prevents this problem, but it's less efficient. Infiniti's VC-T promises the best of both worlds, with a compression ratio that ranges from 8.0:1 for high-power turbo needs to a 14.0:1 ratio for fuel-sipping efficiency. At its heart the VC-T engine is a simple idea, but it's complicated to explain. Consider yourself warned. The photo below from Infiniti serves as a good visual overview. For the truly nerdy, this patent application covers the mechanical concept. Instead of having the pistons connected to the crankshaft, Infiniti's engine has a pivot arm with a connection on each end. One end connects to the piston, the other connects to a second lower shaft, which is controlled by an actuator arm. At any given time the engine's pistons move up and down according to the lobes on the crankshaft. But the actuator arm can change the angle of the pivot arm up and down. That is, the pistons still move in the same motion with the same stroke, but phase the entire stroke up or down. Move the pivot up and there's less room at the top, which means a higher compression ratio. Move the pivot down and the compression ratio goes down, too. As an added bonus, the lower shaft eliminates the need for counter-rotating balance shafts. Infiniti says this system works constantly and can vary the compression ratio to any number between 8:1 and 14:1. It also uses electronic variable valve timing on the intake valves to switch into Atkinson-cycle combustion for greater efficiency.

2020 Colorado Winter Driver's Notes | Behind the Wheel S02 // E12

2020 Mercedes-AMG GLC 63 I’ve had bad luck with SUVs this winter. Especially performance ones. First, I got a 2019 Range Rover Sport SVR delivered on summers right as two feet of snow fell, rendering it undriveable. Then, coronavirus cancelled Easter Jeep Safari as well as my trip out to Moab in the 2020 Jeep Wrangler Rubicon Diesel. Thankfully, when this 469 horsepower luxury mall crawler was dropped off, the sun shone down and the snow (mostly) held off.  The first thing that I noticed was there were a few blank buttons throughout the cabin, something that you may see in an entry model vehicle, but IÂ’m not accustomed to seeing in an AMG. Not a great look for a vehicle with an $80,000 price tag. Thankfully that was where the disappointment ended. As soon as you press the start button, the engine fires up and the exhaust note is incredible. Hopping on the highway ramp near my house, I floored it, and the biturbo V8 had me pressed back into the driver's seat, and this wasnÂ’t even the S version that our staff drove last year. Inside and out, the GLC 63 was everything youÂ’d expect from Mercedes. The interior was immaculate, and while the infotainment wheel and touch pad may take some getting used to for someone who isnÂ’t familiar, by now I have it down so that I can use it without looking. And while the V8 left me smiling ear to ear, I was most impressed by the amount of useable interior space there is. I happened to be moving at the time of this review and while all of my large furniture was shoved into the back of a moving van, I was able to fit almost everything else in the back of the GLC. 2019 and 2020 Fiat 500X Trekking ItÂ’s hard to say goodbye to an AMG and then turn around and be excited when a Fiat 500X pulls in your driveway (I know, I know, automotive journalist problems). That being said, when the red Fiat pulled up, I found myself admiring it. I am very familiar with the 500X. Back in 2016 Autoblog had one for a year as our long term test vehicle. I drove that car everywhere, multiple trips up north in Michigan, and even tracked it at Gingerman Raceway for a few laps before the brakes started smoking.  The 2019 model I had in my driveway and the 2020 model I drove in the snow up in the mountains feel very similar to that car. The interior is stylish and surprisingly roomy. The greenhouse is airy.