Redline 0W-40 vs 5W-40 in turbo

Status
Not open for further replies.
Joined
Apr 28, 2010
Messages
36
Location
Australia
So my volvo T5 turbo will soon be running 16 PSI instead of the factory 9 psi. The maximium this turbo will push is 18 psi or so until it goes beyond the limits of its efficiency. So there will be alot of heat generated at the turbo bearings, especially with a rear mounted turbo.
Ive read a story recently of someone with the same sort of boost level developing noisy turbo bearings. This could be caused by hot shut downs, faulty bearings, etc. im not sure but it's made me reconsider my choice of M1 0W-40. My manual calls for a 0W-40 oil, and that's it. Earlier models with the same engine asked for a 5W-30. Why the changed to the 0W-40 i don't know, but i guess there is a good reason.

I would like to stay with the 0W-40 weight RL, for warranty reasons. Even though i know RL isn't certified, if i do need to make a claim i can at least plead the correct grade of oil was used. Regarding the engine mods, i can get around that.

Question - looking at the Redline web site and doing a search here, it looks like the 5W-40 is a better oil for the job. Can the 0W-40 still put up a good fight for what i have intended out of this motor? Which one to go for? 5W-40 and worry about the warranty claim if it ever happens (unlikely)?. Specs for both below, and i would still like to follow the manufacturers 15,000 km OCI if possible. Hope you can help!


Viscosity Grade SAE 0W40
Vis @ 100°C, cSt 15.1
Vis @ 40°C, cSt 81
Viscosity Index 197
CCS Viscosity, Poise, @*C 57@-35
Pour Point, °C -60
Pour Point, °F -76
Flash Point, °C 218
Flash Point, °F 424
NOACK Evaporation Loss,1hr @ 482°F (250°C), % 9
HTHS Vis, cP @150°C, ASTM D4741 4



Viscosity Grade SAE 5W40
Vis @ 100°C, cSt 15.1
Vis @ 40°C, cSt 94
Viscosity Index 170
CCS Viscosity, Poise, @*C 55@-30
Pour Point, °C -45
Pour Point, °F -49
Flash Point, °C 250
Flash Point, °F 480
NOACK Evaporation Loss,1hr @ 482°F (250°C), % 6
HTHS Vis, cP @150°C, ASTM D4741 4.6
 
RL 0w-40 is the most shear stable 0w-40 on the market, however their 5w40 is considerably more shear stable than the 0w-40. Both may work well, but I'd probably opt for the 5w40 in this case.
 
Use the RL 5W-40 in your engine, but keep some 0W-40 M1 empties around to show them if it fails, no way they could tell what you were actually running.
 
The 0w is fine. Look at the numbers above. It isn't just for cold weather. It flows better at start up and is the same viscosity at operating temperature.
 
I use AMSOIL 10w30 in my 04 Volvo S60R that runs 14.5 psi stock and much higher with some mods and I'm at 105K no issues. So I think the 0w will be fine.
 
Last edited:
You're nearly doubling your boost and you're concerned about the factory recommended oil grade?
wink.gif


-Dennis
 
Status
Not open for further replies.
Back
Top