NO - Why take a chance that this could hurt your long term reliability
NO - I know of specific cases where they've made an engine run worse
HECK NO - ARE YOU CRAZY? THESE THINGS ARE TRASH and will RUIN YOUR ENGINE !

THIS IS ONLY MY OPINION

None of these "no" answers adequately expresses my opinion. I simply think it's a waste of money; and for a group of people that bought a car to save gas and $'s it does not make sense to spend more than is necessary, especially for those that bought a "base" car and are really "frugal". Then again I'm no mechanic, but I would think that you would want your rings to seat and other engine break in issues to occur before you go greasing up the cylinder walls at least if you do use it you might want to wait until you have some miles on your car.

The only good reason to change oil often is to avoid oil breakdown and ultimate non-protection of parts against friction. I've already stated that I feel synthetics are a waste of money if you change your oil evey 5000 miles and even more so if you change it every 3000 miles. Modern oils, in a low RPM engine should have absolutely no issues running 5000 miles. Slick 50 is one step beyond synthetics. I don't see as it's needed. For someone like me that has driven 10,000 miles in 3 months I would not hesitate using synthetics and changing every 15,000 miles if it wasn't for voiding the warranty. Long trips (high milage) are not what kills the oil. My old BMW engine conputer analyzed the starts and miles and other things back in the 80's and I typically didn't need an oil change under 7000 miles, usually less often.

This engine is a de-tuned, low reving, low hp/cu in engine, not a high performance 8000rpm redline engine. If built to quality Toyota standards it should last a loooong time.