本文发表在 rolia.net 枫下论坛Why should I use your premium gasoline (91-93 octane) instead of regular (87) or midgrade (89)?
Compared to our regular or midgrade, our premium is different in two ways. (1) It has a higher octane rating and, (2) it contains additional detergent additives.
(1) To find out what octane your engine needs, first check your owner's manual. The recommended level is often 87 octane. Some models have high compression engines which are designed to utilize the octane levels of 89, 91 or higher.
Ordinarily, your vehicle will not benefit from using a higher octane than is recommended in the owner's manual. But if your engine knocks or pings at the recommended octane level, you may need a higher octane gasoline to prevent the knock. Knocking may occur under certain conditions. A small percentage of vehicles may knock because of variations in engines of the same model due to manufacturing tolerances, or because of an unusual build-up of engine deposits during the first 15,000 miles of driving. Other factors such as extremely hot weather, changes in altitude or hard driving conditions (like towing a heavy load) may also cause knocking.
Many modern vehicles are equipped with an electronic device that detects and eliminates light knocking before you hear it. The devices suppress knock by retarding the spark. We believe that some of these vehicles may experience some deterioration of acceleration performance, without knocking, when operating under high engine demand conditions.
(2) Of course, our gasolines have had very effective detergents for several decades. And, because detergent additives help maintain an engine's emission performance, the EPA has required a minimum dosage in all gasolines since 1995. So, while all gasolines now contain detergents, all our gasolines contain additional quantities to better guarantee fuel system cleanliness and our 93 octane gasoline has more detergent than either of the other grades to keep your fuel injectors and intake valves even cleaner.更多精彩文章及讨论，请光临枫下论坛 rolia.net
Compared to our regular or midgrade, our premium is different in two ways. (1) It has a higher octane rating and, (2) it contains additional detergent additives.
(1) To find out what octane your engine needs, first check your owner's manual. The recommended level is often 87 octane. Some models have high compression engines which are designed to utilize the octane levels of 89, 91 or higher.
Ordinarily, your vehicle will not benefit from using a higher octane than is recommended in the owner's manual. But if your engine knocks or pings at the recommended octane level, you may need a higher octane gasoline to prevent the knock. Knocking may occur under certain conditions. A small percentage of vehicles may knock because of variations in engines of the same model due to manufacturing tolerances, or because of an unusual build-up of engine deposits during the first 15,000 miles of driving. Other factors such as extremely hot weather, changes in altitude or hard driving conditions (like towing a heavy load) may also cause knocking.
Many modern vehicles are equipped with an electronic device that detects and eliminates light knocking before you hear it. The devices suppress knock by retarding the spark. We believe that some of these vehicles may experience some deterioration of acceleration performance, without knocking, when operating under high engine demand conditions.
(2) Of course, our gasolines have had very effective detergents for several decades. And, because detergent additives help maintain an engine's emission performance, the EPA has required a minimum dosage in all gasolines since 1995. So, while all gasolines now contain detergents, all our gasolines contain additional quantities to better guarantee fuel system cleanliness and our 93 octane gasoline has more detergent than either of the other grades to keep your fuel injectors and intake valves even cleaner.更多精彩文章及讨论，请光临枫下论坛 rolia.net