I'd stick with 5k OCIs and look at the following;
Wal-Mart everyday prices;
1. Mobil 5000 or QS @ $8.97 = $179.40 for 100k worth of oil
2. Valvoline @ $9.97 = $199.40 100k
3. Pennzoil, GTX, Halvoline @ $10.97 = $219.40 100k
Any of the above will do your 4 runner fine for as many miles as you want to drive it.
Syn is;
Supertech @ $13.48 = $269.60 100k
PP @ $19.94 = $398.80 100k
Mobil 1, Syntec or Valvoline Syn @ $21.94 = $438.80 100k
(all based on 5 quarts, the more you need the more the cost/ savings)
If you get 20 mpg your savings on 100k worth of oil could buy enough gas to drive over 1100 miles if we bought Pennzoil conventional over PP. (at the low low price of $3.20 a gallon for gas...
)
Now, if you buy oil on sale cheaper, the numbers of course change. I can get excellent Shell oil for 49 cents a quart and it would do well for 5k. So a oil change would be under $3 for 5k miles. A LOT of $$$ saved there.
Look around for deals on oil and when you can find some, BUY it and have a little stash. Your Toyota will last with any SM oil out there and 5k OCIs.
Do a UOA for 2 reasons;
Check to see all is OK and MORE IMPORTANT post for all of us geeks here.
Welcome to BITOG!
Bill