I'll keep that in mind when I talk to my tuner this Thursday. Thanks for the input.

I think the simple idea is that 0W-16 shouldn't hurt anything, and would by theory provide good engine protection in comparison to other oils. When it comes to this car though, oil temperature is our biggest haunt and that can result in a poor oil pressure. So as most have said, especially in forced induction situations, you are absolutely guaranteed to get into higher oil temps if you choose to push the car. In the case of 0W-16, it will easily result in far lower than recommended oil pressures throughout much of the higher RPM range. So pretty much no matter how golden this oil is, it would be a risk in your case. Unless you're riding around at 190-200F at peak oil temp, this oil will only do more harm. Too lazy to link, but there are a couple of threads with data analysis on this forum with various oil weights that show how poor oil pressures can get with 0W-20 in higher oil temperatures.

So my tuner said he recommends 5W-40, but that he also wasn't AWARE OF the new GF-6 ratings that are going to be superceding (and be backwards compatible with) the existing GF-5 rated oils. He is informed now.

If you're running ANY particular WEIGHT of oil that happens to be GF-5 RATED, there may soon be a GF-6 rated oil in that same weight. You may want to get more information on this to see if your engine may benefit from the extra protection that it will provide. I believe that it will.

These new GF-6 rated oils promise superior protection over existing GF-5 rated oils.

It can't hurt to at least learn about it, right?

Do we suffer from LSPI due to a downsized turbo?

Seeing how none of our cars came with turbos from the factory, the manufacturer isn’t going to investigate that problem, so there will be no “official” data to look into. And even if you personally look into it, you more than likely won’t find that information in any organized manner due to the fact that the factory is not involved in gathering it. I’m certain SOMEBODY out there has more than likely installed a small turbo into their car.

But, if there is a better grade of oil available in the weight that you use, wouldn’t you want to at least investigate whether your engine would be better protected using it? This new oil is specifically designed for direct injected and boosted engines. It’s designed to replace a grade of oil that has been shown to have flaws in protecting these types of engines.

I would be willing to bet that every turbocharged, direct injected car that is released after GF-6 becomes widely available will require the use of this GF-6 grade.

Do YOU suffer from LSPI? The term "better" is completely subjective? Better at what? Mitigating a problem you don't have?

My engine is not YET boosted, but soon will be. So to honestly answer your question, no. But low speed preignition is not the ONLY issue that the GF-6 rated oils have been formulated to address. See the chart below.

All engines suffer from wear throughout the duration of their usable life, which IS the "....problem [that I do] have", and engine oil is the only protection from excessive forms of it. I am of the opinion that the best quality oil that I can get should be running through any high performance engine such as the FA20/4U-GSE. And it's even more important when it's boosted. If this were an economy engine such as is in my non-vvt V6 Solara, I would not bother with the highest quality oil I can find as it would make absolutely no improvements to the operability or reliability of that engine.

I'm perfectly willing to try new technologies as long as they are proven to work. The new GF-6 formulation definitely won't be WORSE than the existing GF-5 at protecting engines. Otherwise, why would millions of dollars be spent on the research and development?

But if you're happy with the oil you're currently running, keep running it. Nobody's going to force you to do something you don't want to do.

So, you're concerned with wear, yet started a thread about going DOWN in oil weight?
I am confuse.

Read post # 26, where I realized that the new grade is also being released in higher weights.

Asking questions on newly released products is part of my research, hence post #1 on the subject.

Which higher weights? 20? Read my post where I don't run 20 in even my stock motor, in the interest of actual protection.

I've read your post. Taking the liberty to search for you, and although I haven't been able to check EVERY oil manufactuter, of the ones that I did, I could not find your preferred weight in a GF-6 grade. The closest that I could find to your flavor was 0W-30. Sorry.

It really doesn't matter. In a year, maybe two you won't find much of anything other than GF-6 on shelves anywhere.

GF-5 won't break your engine. GF-6 isn't an internal combustion fountain of youth, but I'll bet it won't break anything either.

Edit: but for Pete's sake, don't use 0w-16.

Yes, obviously. I'll probably run the 0W-30 GF-6 when I move to forced induction.

Why not run it before moving to boost?