Your favorite oil for 1NZ-FE

[wooverstone8]

Originally Posted by CB900F2

How many KM or Miles do you run the extended oil?

Usually at 5,000 miles, but I've gone up to 7,600 miles before changing it.

[NYC-SE]

Originally Posted by wooverstone8

Usually at 5,000 miles, but I've gone up to 7,600 miles before changing it.

Then your wasting your money. A quality synthetic should be able to double that. If your changing so soon stick with dino, it's cheaper.

[ncp13]

Dino oil breaks down and leaves sticky gunky residue

[lorne]

Originally Posted by ncp13

Dino oil breaks down and leaves sticky gunky residue

I'm interested in why and how you can say this. Every oil, dino or synthetic, has a lifespan — does it not? So if you change out dino lube on schedule — ie: before it fails, why should it not be OK? Even dino oil has detergents and agents in it that are the developments of research and chemistry.

And BTW: I for one won't put an all synthetic oil into an older engine that has been running dino all it's life. I've seen the proof of how old gaskets can begin weeping, and I've read why it happens. But that's just me with the evidence on the garage floor. YMMV.

[06YarisRS]

Originally Posted by lorne

I'm interested in why and how you can say this. Every oil, dino or synthetic, has a lifespan — does it not? So if you change out dino lube on schedule — ie: before it fails, why should it not be OK? Even dino oil has detergents and agents in it that are the developments of research and chemistry.

And BTW: I for one won't put an all synthetic oil into an older engine that has been running dino all it's life. I've seen the proof of how old gaskets can begin weeping, and I've read why it happens. But that's just me with the evidence on the garage floor. YMMV.

Yeah, to meet the API standards, conventional oils can't gum up unless exposed to extreme heat or severely extended intervals. Most engine applications wouldn't be able to push a conventional oil to its limits under normal or even hard conditions. I run synthetics in my car largely because I can buy them now for virtually the same price as conventional and it's nice insurance if I happen to run the oil in the pan longer than normal. I do like to have a synthetic for my turbo given the potential extreme heat and pressure conditions in the center rotating assembly.

I have not shared the same leaking experience as you when switching from exclusively conventional to synthetic. The only leaks I've had likely would have occurred regardless of what oil was in the sump.