2015 Ford Mustang GT: Auxiliary Gauges Are Entertaining, If Little Else
by Carlos Lago, Road Test Editor on December 21, 2015
Our 2015 Ford Mustang GT's optional Performance Pack includes these two auxiliary gauges. They show oil pressure and vacuum (boost on Ecoboost models), and they are superfluous on a stock car.
Brent Romans gave an overview and debated their usefulness, but I want to take a closer look. Some might argue that a vacuum gauge is helpful for driving in a more fuel-efficient manner. This is true, but this argument vanishes like tire smoke when you're pairing 435 horsepower with a 3.73 final drive.
Monitoring oil pressure helps when you're worried about it dropping, like when sustaining more than 1.0 g in a long corner. Two problems, however:
One, you shouldn't have to worry about this when you're in a car that can sustain 1.0-plus in a corner from the factory (that's a problem that the engineers' who built the thing should've solved). And two, the gauge is out of the driver's field of view, which makes it hard to check when you're actually sustaining that 1.0 g-plus.
On the upside, the gauges are entertaining. When you nail the throttle, all the needles go to the right. And that's the fastest direction — unless you're Aston Martin.
Interesting to note that the topline, performance-orientated Shelby GT350 doesn't come with auxiliary gauges until you add the $6,500 Track Package or $7,500 Technology Package. Then it adds an oil pressure gauge like the standard Mustang, but replaces the vacuum gauge with an oil temperature gauge.
In our Mustang, I'm thankful there's still a digital oil temp readout accessible in the gauge cluster. It's easier to reference when you're driving hard, which is what our Mustang begs for.
Carlos Lago, Road Test Editor