Yes, I really do believe cars need top tier gas. Gas doesn't burn cleanly in engines, which is why all gas stations have to add some kind of detergents to their gas. Only Top Tier brands are certified to have a much higher concentration of detergents to keep your engine clean. There are also other benefits of them adding additional detergents, like some resist the tendency for gas to attract water. I only buy from Top Tier brands, and my truck has been running well over 100k miles without any hiccups.
TyE wrote:From my understanding, the higher the octane, the cleaner the fuel is. The higher the octane rating, the more resistant the fuel is to knocking. I read a MIT article on this and it said, "If the majority of light-duty vehicles in the United States ran on higher-octane gasoline, the automotive industry as a whole would reduce its carbon dioxide emissions by 35 million tons per year, saving up to $6 billion in fuel costs, according to a new analysis by MIT researchers." I would tend to believe researchers from MIT.
This isn't necessarily true. If your engine requires a higher octane gas, then you should use it for best engine performance.
Since the EPA will require higher MPG cars in the future, one way that can be accomplished is by using a higher compression engine, which would require a higher octane fuel. If you use a higher octane fuel in your car that doesn't require it, you won't receive any kinds of benefits. The engine has to be equipped to use premium fuel.
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