I am planning ahead for oil and filter to use on my 2012 Elantra. Currently have 3100 miles and changed oil and filter at 2K to PYB 5w-20 and PureOne. Reading here that was not necessary but that's where I'm at. The car is used mostly for an 80 mile each way daily commute to and from work. I'm an old, slow driver looking for max mpg, hence I bought the 6 speed MT Elantra. Manual suggests to use Quakerstate Energy Conserving Oil, API Service SM, ILSAC GF-4 or above and 5w-20 for best fuel economy. Range is 5w-20 to 10w-30 depending on temperature. Change interval for normal conditions is 7500 miles. I drive abut 70% highway miles and the rest stop and go. I live in a hilly section of Pennsylvania. The filter is located on the front bottom of the engine and there is no shield protecting it like on the last model Elantra so I am thinking of staying with the Hyundai filter now that I've compared the stock filter to the PureOne. The casing is much heavier and would likely better withstand a stone shot. I am also thinking I should install a light weight aluminum sheetmetal shield, in which case the outer durability of the filter would not be an issue. Any thoughts on the filter, any data on Hyundai filters? I am thinking that if I use synthetic oil 7500 miles would be ok. I would prefer Pennzoil to Q-State, but that's mostly because my Dad didn't like the looks of his lower end when he tore his 70 Malibu engine down and he used Q-state and then switched to Pennzoil. But that was long ago. I have a 98 Civic with 600K on it and I used mostly PYB in it, now 350K on current engine. Thoughts on Qstate vs. Pennzoil and dino vs. synthetic? Also what about a bypass if I want to get max miles on the engine? I don't know how that would fly with the warranty, but if I'm going to do it I should do it now, right? Thanks for any thoughts.