switching back to natural oil?

[fnkngrv]

Originally Posted by bronsin

Also you will void your warranty if you dont change your oil according to the owners manual.

Also see below.

The warranty is only 3/36 anyway. Secondly they have to prove that you changing your interval was the direct cause for engine failure which they will not be able to do. 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. Lastly, the 1NZ is such a cheap motor to replace it wouldn't even be worth worrying about warranty IMHO. A Toyota motor for the most part will continue to run even after the vehicle that houses it has rusted away and is dust if you leave it stock.

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.