| http://www.w3.org/ns/prov#value | - t they adjust the timing.Read the manual.If it says the words premium required then fine, you might actually need it.If says recommended or nothing at all, and this is the overwhelming majority of vehicles, then premium is a waste of $$.http://auto.howstuffworks.com/premium-gas-luxury-vehicles.htm [howstuffworks.com]http://lifehacker.com/5846880/should-i-use-premium-gas-in-my-car [lifehacker.c
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