would i get better mpg if used kn air filters or premium gas????????????
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K&N offers virtually no gains in performance beyond what people claim to "feel" after paying for them. Look for hard data on the interwebs. Premium gas will offer no advantages if your vehicle does not require it. Otherwise, you're throwing money away. "Premium" is a misnomer anyway. There's nothing better about the fuel; it's just made to work with higher-compression motors so that it doesn't ping.