The answer to your question is in the original post.

OEM turbos, FP Green, etc., use a steel-on-brass bushing. FP Reds and Blacks use larger, heavier compressors and a steel-on-steel bushing. This difference is significant when it comes to oil.

Ball bearing turbos like Garrett aren't failing because they use a low friction system that isn't nearly as sensitive to oil content.

 

The issue is a much larger than stock compressor wheel, working with a turbo cartridge that was designed for a stock compressor wheel.

 

Ted, I think a titanium on titanium bushing would improve fp red and fp black reliabilty.

 

so many guys had turbo failures that never say anything.
goes for stock and aftermarket.
just look at the hotside problem. you think everyone reports his turbo failure?

 

what are the minimum acceptanble values for Phos/ZDDP?

 

if you replace it every 2.5k-3k your fine with any synthetic oil and drive like a normal human being on the road..

 

this is exactly the wrong attitude to the situation, which Ted B is trying to enlighten us on...
Read and digest, you dont have to regurgitate half truths

 

Not true. I change my oil every 2k miles. I do not track my car or drag race it! My fp red turbo has only lasted 12k miles. I also have been using the lastest fp oil line kit since I put the turbo on my car. At every oil change, I remove the oil line filter and replace it.

 

panama people also use the AMSOIL

thaks for the support Gary


Andy

 

I'm not at all an expert here but shouldn't they have used the same weight oils for this test in order to do an even comparison??? The BP was 20w50 and the M1 was 10w30. How can you consider that to be a fair comparison on a 580hp motor? Furthermore, why would you run a 30 weight oil in a car putting out that much horsepower???

 

Why would anyone use even lighter oils for 800hp F1 engines?

There isn't so much a correlation between the weight of the oil and hp. If the 30 weight oil gives film thickness suitable for the internal clearances, the engine will deliver more hp than it will with a heavier oil.

 

Yes, that kind of stuck out to me too. It was not at all an apples to apples comparison between Mobil 1 and Penn Grade 1. For all we know it could have been the viscosity that made the difference in thrust bearing life.
Then the next thing is, picking a viscosity to suit the thrust bearing in your turbo is the tail wagging the dog!! Is your turbo more important than your engine?
Your turbo bearings need to be designed so they can live with whatever oil is good for your engine. If your engine block is stock, your bearings could have a .0010 clearance, you don't know, the mfr specs are probably .0008 to .0018 or something like that. So unless your stock engine is very old and very loose you probably don't want to jump 2 viscosity grades (from 30 to 50). A built engine is a different story.
Hate to say it but I think the FP oil recommendation is more of a smoke screen for a mistake in thrust bearing design. It does bring up some interesting points about motor oil. But really with these hot-rodded turbos, I think the time has come to go either angular contact ball bearing for the thrust. Or for a plain bearing, go with a bi-metal design which uses a steel backing for the strength Robert was looking for, with a 10 thou thick layer of actual bearing material over the top of it, to get the good bearing properties.

 

Again forgive me for not being an expert here. I'll take your word for it on the F1 engines but putting that aside... Doesn't it still make sense that the BP 20w50 held up better than the M1 10w30 in this particular test? Isn't a higher viscosity oil used because it stands up better to heat and friction?

 

Please help confirm minimum acceptable values for Phos/ZDDP to save the turbos so it can be possible to choose the right viscosity/detergents/additives for our engines.

 

if you look back in this thread we have posted much data that covers that, also search under AMSOIL and you will find some recent oil threads that have tons of info to streer you ,,, you just need to filter through the nonsense.