switching back to natural oil?

[Happy Little Pony]

Third speaking from experience from blowing up a 4E-FTE with conventional and also 1NZ with synthetic I can tell you that there is definitely a cleaner difference between them when you tear them down. It may not an apples to apples comparison, but from what I had occur both from over boosting there was a lot more damage on the 4E with conventional than the 1NZ with the synthetic.

No once during my thirty years of driving have I "blown up" an engine during my daily commute. The Yaris I drive is the tame little economy car with the decidedly non-high performance engine. If you've turbocharged your Yaris and are using it as a race car, then I'll agree that synthetic is a good idea in a hot rod engine. I just drive mine slowly around town.

Lastly, the 1NZ is such a cheap motor to replace it wouldn't even be worth worrying about warranty IMHO.

Hey, Mr. Moneybags, maybe in your world an engine is cheap, but in my world just the labor to install a new engine would be crippling. The original poster in this thread was worried about the few dollars difference between a synthetic and a conventional oil change. I won't speak for him, but I bought the Yaris because I can't afford to throw cash around.

This is a debate that can go round and round, but there has been plenty of independent studies out there showing that synthetic has several advantages over conventional oil one of which is the ability to move away from the reliance of fossil fuels.

I think what you mean here is that if we double our oil change interval with synthetics, we would use half as much motor oil, thus reducing our consumption of fossil fuels. True enough. I just bought a jug of Valvoline NextGen oil, free after rebate at Advance Auto Parts. And I've used G-Oil in the past and would consider doing it again in the future.