Hi,
One of the reasons why I bought a new car was for the warranty for the first 60k miles.
My last car needed head gaskets around that time and
BECAUSE I changed the oil more often than required I was able to get the MFG to pay for the repair out of warranty. (The powertrain was 3yr/36k).
When you can show the MFG that you are doing better than they require (and they don't care about syn oil unless the manual states it) your taking alot away from their bag of tricks to not work on your car.
We have had discussions on that the dealer really can't this or that in other threads.
I go with what I know works and I think following the manual will cause you the least grief.
As far as you can do better, I've done MANY used oil analysis on my Corolla and the BEST one was with normal Pennzoil (bought for 69 cents a quart and avail for $9.97 for a 5qt jug all day long at Wal-Mart.
The used oil analysis was better than Mobil 1 run in the same engine for the same time. Better than Castrol Syntec blend for the same time. Better than Castrol Syntec and Castrol Syntec blend (50/50 mix) for the same time.
So, at todays prices for Pennzoil plus a $2.07 supertech filter (which is a good filter) you can do a Oil change for $10. If you did it every 4-5k miles (lets use 4k for Pennzoil) in 60k miles your oil change cost will be $150.
If you use Redline (don't know how much per quart but lets go with $6.50) and a $4 filter your oil change every 5k will be $30. (for warranty reasons) Your 60k oil change cost will be $360.
So $210 more in 60k miles.
Lets forget about the warranty and go with 10k oil changes with Redline. Your 60k oil change cost will be $180. Still more than Pennzoil but you've made it harder to get warranty work done *IF* you need it.
If I want to gamble I would have bought a used car.
Now, If you change your oil every 4-5k with a good conventional oil your doing more for it than putting Redline in it for 10k IMO.
Others will disagee with this as we have discussed in other threads.
I've never had any engine problems other than my last car eating headgaskets every 50-60k. All I've ever used is a good dino and filter every 4-5k and my 1986 Jetta which has had nothing done to the engine is coming close to 300k miles and still runs as good as it did in 1986.
I put tons of miles on my cars (my 2005 will be out of Warranty for everything in 2 more months) and have spent some $$ to keep track of the oils and engine with used oil analysis. I know what does the job.
You drive your car like an Adult, thats a big part of it.
For me, I just don't see why I would want to spend in 60k miles $210 more in oil changes. In the end, both engines will be the same!
$210 at todays gas cost ($3 a gallon) and your Corolla getting 40 miles per gallon is 2800 miles worth of gas!
Thats driving across the USA! (or about a months worth of driving for me)
My 3 cents!
Take care, bill