Hello guys, I'm kinda stumped here... I'm looking to do my first oil change from the factory oil that is currently in it. I'm planning on switching to synthetic, due to the fact that I just want to baby it, and get the best performance, economy, and engine life out of it. I'm pretty unsure of what to use. I have heard nothing but good things about Royal Purple, which is what I was planning on going with, but it is pretty pricey... And I've heard claims that the K20 engine wouldn't benefit from it too much more than a cheaper brand of synthetic. I've also heard that the oil life of Royal Purple isn't too high, someone somewhere, albeit possibly retarded, said 2000 miles. I find this hard to believe as the RP website claims 12000. If it's really actually worth it, the price isn't really an issue. I just want to make sure that I couldn't be getting basically the same results from something a bit cheaper, and if so, some recommendations would be fantastic. I've heard good things about Amsoil, Mobil 1, Redline and the such. My local Advanced has a pretty awesome deal going on now, which is what the dude there recommended... Castrol Syntec 5w30? 5 Quarts + a K&N filter for $30. But from what I hear Castrol Syntec isn't even fully synthetic. So, I just don't know! Any help would be greatly appreciated. I do tend to run it hard at times, and since it's a high revving engine, I'm sure this has some impact on what I should choose. Regardless of what I choose, I'm probably going want to change it every 6,000 miles or so. 1. What kind of vehicle you have: 2009 Honda Civic SI, currently stock, planning on a cold air intake soon... But other than that, no further upgrades in the near future. 2. What your owner's manual says: It doesn't say too much... Basically just the API certification seal, 5w-30, may use 10w-30 if the temperature is never below 20 degrees F. 3. Where you live: Richmond, Virginia. The weather here is extremely random, the summer brought temps in the 100's. I'm unsure what the winter will bring. 4. How you drive (easy? hard? fast? slow?) Generally I go for economy, but I still drive pretty fast... And I definitely get on it pretty regularly. 5. What your daily drive is like (short trips? long trips? city? highway?) I'd say I drive about 60 miles a day, between work, and just being out and about. I'd say about 50/50 city/highway. 6. Whether your car has any known problems Nope, Just got it... It's a 2009, but it only had 2600 miles. Still on the factory oil. Thanks in advance.