My (summarized) response:
To summarize:
You can use something like XXX, pay top-dollar and run it beyond the manufacture's stated intervals to justify the additional cost. Risk sludge, deposits and excess wear. In the process, you will void your warranty both by exceeding the change interval and using a non-API Approved oil. Plus you have to do oil testing to "verify" the results and you have to join a Cult of Psychos who obsess about validating the results and seek the approval of other Cult Members and new recruits.
-OR-
You can use a well-formulated otc motor oil at perscribed interval as the owner's manual states. Preserve your warranty and save a LOT of money while achieving better/best results. Choosing the actual brand of oil is secondary, as long as it carries the API rating, you can pick by colour of the bottle, brand that your Grandpa used, recommendation of a friend or be a bit more analytical and take a look at used oil analysis results that pertain to your engine type and desired oil/change interval.
Simple? I think so.
Some of the links I posted to support my assertions:
Your TOYOTA engine, 10k on German Syntec -no problems
http://theoildrop.server101.com/ubb/...=002849#000000
German Syntec at 11k vs AMSoil in same engine, Toyota Landcruiser
AMSoil = high copper
http://theoildrop.server101.com/cgi/...c;f=3;t=002070
Another 10k run in the TOYOTA 5VZFE with German Syntec, perfect results.
(cheap STP filter none the less...Champion Labs, same as SUPERTECH!)
http://theoildrop.server101.com/cgi/...c;f=3;t=002384
Shell G-III Synthetic in TOYOTA 8000+ miles
http://theoildrop.server101.com/ubb/...=002004#000000
1.5 years in TOYOTA 5VZFE truck fully loaded with Chevron (Havoline)
Lower wear than AMSoil
http://theoildrop.server101.com/ubb/...=002004#000000
TOYOTA 5VZFE with AMSoil ASL, shot at 5000 miles
http://theoildrop.server101.com/cgi/...c;f=3;t=000670
and:
2006 RSX Owner's Manual:
"Always use a Premium-Grade detergent oil displaying the American Petroleum Certification Seal"
Change interval: 10,000 miles (normal service) 5000 miles (severe service)
I think I'll be ok at 6000 miles with a proven oil carrying the API Seal....unless you think Honda is wrong and and can prove it.
Thanks for the friendly advice though