hally

http://www.animegame.com/cars/Oil%20Tests.pdf

333pg333

I remember seeing this test years ago at the Buchanan's workshop. Interesting nonetheless Hally. I'd say there might have been some improvements since then. That was at Mobil's low point.

Paulyy

I wonder if there's a newer one?

hally

so these are many years old, crikey I didn't realize, someone shared that link with me, can't find a date anywhere on it.

Paulyy

I can tell by the penrite oil. I use the HPR ones. and the whole bottle has changed.

hally

Thats true, me too, I'm on the penrite HPR 15 60

Paulyy

I think im on HPR20 20 w50+10 I have a whole barrel of it at work. works out cheaper..

Cyberpunky

That Royal Purple is impressive so it is no wonder so many on RL swear by it. I have never seen it stocked anywhere down here though.

Paulyy

Autobarn.. stock it, probably some stores. Bursons?

Cyberpunky

Thanks Pauly. I haven't seen them at either of my locals but may have to some more investigating.

333pg333

VR1 would give similar results.

Paulyy

Would believe so.

I would like to see new tests with todays oils.. Would be very interested.

jmj951

On the topic of oil - since the turbo is using the same oil as the engine, has anyone ever considered separating the oil circuit used for the turbo versus the engine? I can't believe that the optimal engine oil could also at the same time be the optimum turbo oil. And as an engine ages and begins circulating little bits of metal, that must be terrible for the turbo.

The cost of a typical turbo probably doesn't justify the expense of separating the oil feeds, but if you were to buy something like a Borg-Warner EFR turbo, that's something that should be considered.

I read on another thread that Evergreen said it's fairly common for the seals on their newly-rebuilt turbos to be destroyed by a new engine in its break-in period due to the amount of metal that gets circulated in the break-in period. A band-aid is to add a separate filter in the oil feed, but what if you completely isolated the turbo with its own cooler (such as the stock oil cooler), reservoir, and an electric pump? It couldn't be that much more complicated, and would be much less risky, and would allow you to run a much thinner oil (think faster spool) than the 20W-50 we routinely hear recommended for the engine. Has anyone done this? Have you ever seen a turbo manufacturer specify the minimum oil weight that should be used? I only found one FAQ that stated the minimum viscosity is SAE 30, but I think that's too generic to assume it's valid for all turbos.

pole position

Low viscosity = faster spool? Time to read up on the turbocharged Otto cycle engine

Voith

Pre turbo oil filter looks like a good alternative..

https://www.rtmracing.com/xcart/prod...roductid=17923

I will use efr 7064 for my build and will need to think of something on this front.