Just to clarify for some of you who may have A.D.D. or won't bother to watch the video, these are the results of this Marketplace study:
1. Using a Dynamometer, they confirmed that premium fuel did not generate any more power than regular octane in a car that requires only regular octane fuel. The engine compensated, and generated the same torque and horsepower.
2. Doing fuel economy tests, they determined that premium fuel did not show any discernible difference from using regular octane in a car that requires regular octane fuel.
3. After doing some research, they determined that the detergents used in premium fuel are the same as used in regular fuel, and that more detergents in your fuel wouldn't be a good thing.
4. By performing an emissions test (starting at 13:20 in this video), they determined that regular octane gas in a car that requires regular octane fuel actually burns cleaner than does high octane fuel in that same car. High octane fuel burning in a car that requires regular octane fuel results in excess unburned hydrocarbons, because the premium fuel is not burning properly in a regular compression engine.
5. The oil companies generate greater profits whenever we spend more on premium fuel, so they generate marketing propaganda to make us believe that premium fuel is better.
6. Modern cars will compensate for engine knock before you will ever hear it, so if you're hearing engine knock, it means something is wrong with your engine that high octane fuel isn't going to fix.
It's not even a valid argument; it's like debating whether or not cigarettes cause lung cancer. Except in this case, we don't need a lab to scientifically test this ourselves. We can get emission tests done on our cars, and we can get access to Dynamometer. This is a debate between people spreading marketing propaganda created by the big oil companies versus people who have done real science that you can do yourself, and if you're going to continue to perpetuate the marketing bullcrap spewed by the big oil companies, people like me are going to call you on it.
In our culture obsessed with absurd excess, the Nissan Micra is my counterculture car of choice.
Be sure to visit my blog at mymicra.com
View my fuel log 2015 Micra SV manual: 6.4 L/100 km ... 44.3 mpg (Imp) ... 15.7 km/L ... 36.9 mpg (US) ...