A method of producing liquid fuels by providing an olefin feed containing at least one C2-C20 olefin, oligomerizing a part of the feed in the presence of a first catalyst to form a first product comprising oligomers of the at least one olefin, and oligomerizing a portion of the first product in the presence of a second catalyst to produce a second product. The drag reducing compositions can have improved dissolution rates in hydrocarbon-containing fluids. The shape of the headlight visor portion is designed to substantially cover the headlight as viewed through the cross view mirror during operation of the vehicle. By limiting the number of transitions in the address bits, charge gain failure of a flash memory device is minimized and even may be eliminated. The relevant user generated content is displayed.