Why is 91 gas better than 87?
Why is 91 gas better than 87? The main difference with premium is its octane rating — 91 or higher compared with 87 for regular octane. The higher octane gives premium gas greater resistance to early fuel ignition, which can result in potential damage, sometimes accompanied by audible engine knocking or pinging. What kind of engine does a Police Interceptor have? The Police Interceptor is backed by a 3-year/36,000-mile warranty. A law enforcement version of the Ford Crown Victoria, the 2008 Ford Police Interceptor is powered by a 4.6-liter V8 engine (250 hp) that utilizes E85 flex fuel to improve...