Bobistheoilguy.com
For more info then you can possibly digest in a month on oils, coolants, filters (oil and air), additives and gasoline - try this site :
www.bobistheoilguy.com
Click on the FORUMS tab about half way down the page on the left side. After a year and a half of active "lurking" I have learned the following:
1) Use synthetic oil, change it at Manufacturer's recommended intervals.
2) The differences between synthetic oils are so minute it comes down to personal preferences.
3) Don't use "Dex-cool" in a vehicle not designed for it and equipped with it from the factory.
4) The BEST air filter is: (You will have to read the "ISO 5011 Air Filter Test" results yourself - you won't believe me!)
5) The WORST air filter is: (You will have to read the "ISO 5011 Air Filter Test" results yourself - you won't believe me again!)
These guys on the forums are FANATICAL about this stuff (hmmmm. . . sound familiar?), but it is worth checking out. As with most forums, you will quickly pick out the actual experts on the subject at hand and those that just like to type.
Happy reading!
Blast