We could see this coming. During a similar Car and Driver test 18 years ago, an Accord powered by a 3. The modern CR-V, with half the displacement but rated at just 10 fewer ponies, makes the same argument: don't waste your money on premium. Switching from 87 octane to 93 yielded a 7-hp gain on the dynamometer, but that advantage was lost in the noise at the track.
There, the CR-V's zero-tomph and quarter-mile times both tracked a tenth of a second slower on the expensive stuff. While fuel economy at 75 mph ticked up from Honda built its reputation on a line of unassuming, egalitarian motorcycles in the '60s. Nearly 60 years later, the company's identity is still predicated on the same sensible and modest ethic, right down to the fuel that you put in the tank. BMW explicitly warns about engine damage from doing so, and while that seemed unlikely in such mild temperatures, using the cheap stuff would have been wildly out of touch with what an owner would do at least until this M5 reaches its fourth owner sometime in BMW requires octane fuel at a minimum, with 93 recommended, so we did just that, switching between the common forms of premium gas depending on which state you're in.
Are Californians, with their watered-down premium, leaving something on the table? We wanted to know. The dyno results shocked us. Not because of the hp difference between 91 and 93 octane. No, that delta was in line with expectations.
Our jaws were left hanging by just how much power and torque we measured. While BMW claims horsepower at the crank, the dyno reports it makes that much at the wheels after driveline losses on octane premium. And both fuels produced significantly more torque than BMW's advertised lb-ft.
The higher-octane fuel trimmed a single tenth of a second across all of the M5's acceleration times. That results in a time-bending 2. The BMW also claimed the largest fuel-economy margin in the test, but the 0. The M5 Competition stands as proof that the octane rating does make a difference, although in the case of these two premium fuels, if you're forced to use 91 octane, you're hardly missing out.
At Naturally then, the Ford hauls ass as effortlessly as it hauls a half-ton of manure. When fed 93 octane, this pound, self-propelled wheelbarrow will crash 60 mph in 5. Power at the wheels dropped from to horsepower with the change from 93 to 87 octane. That difference seemed to grow, and we could even feel it from the driver's seat at the test track. Compared with premium fuel, regular feed sapped the F's urgency both leaving the line and in the meat of the tach sweep.
The rush to 60 mph softened to a still-blistering 5. In a tough economic climate, it can be hard to condone spending extra cents on high-performance gasoline.
This means that you get more miles to the gallon, because it optimizes engine function, meaning that little fuel is wasted, allowing you to go further on a single tank of gas. When low-quality or sub-par fuel is used, power levels will drop sharply and acceleration will feel weak. Add any additional stress, such as towing or uphill driving , and you could be looking at a greatly-increased risk of overheating, not to mention rapid and accelerated part wear.
This fuel features a cleaning agent which is specifically designed to prevent the buildup of carbon inside your engine. The cleaning agent will even help remove existing carbon it finds in your engine system too. Here are a few:. Using higher octane fuel keeps your engine running in its optimal range. Using the right fuel source will help your engine to use the proper amount of pressure and power efficiently when it needs it, without wasting power. BMWs are known for their exceptional performance standards.
Higher octane fuel supports the power and speed that BMWs can achieve, and without the higher octane fuel your engine has to work harder at a higher temperature to achieve similar performance results. This allows your BMW engine to endure the added strain without damaging the engine in any way.
The suggestions made by your BMW manufacturer were developed based on statistics and testing that found the optimal method of care for the best results for BMW cars. Our level of knowledge in German-engineering and specialized care is what sets us apart from nearby dealerships —not only do we offer better quality care , but at more affordable prices.
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