I need recommendations for three different vehicles. 2003 Honda Accord EX Sedan 2.4L 4 cyl. with 195000 miles, 2008 Honda Accord EX Sedan 2.4L 4 cyl. with 20000 miles, and a 1998 Honda Civic EX 1.6L 4 cyl. with 148000 miles. I live near Tulsa Oklahoma. The 03 Accord and 98 Civic are driven about 80 miles per day. The majority of the miles are highway miles. These vehicles are driven fairly aggressively. 75mph with quick acceleration. The 08 Accord is driven 40 miles per day in a conservative manner. I am currently using Castrol Syntec 5w-20 with purolator pureone filters in all three vehicles. The 03 Accord consumes oil. It drops from the full dot to the fill dot on the dipstick (don't know how much that is) over 7500 miles. The 08 Accord doesn't consume or leak. The 98 Civic has a slight leak at the distributor. I don't know if it consumes because this is my first oil change with this vehicle (just purchased). Thanks for the recommendations.