I have a 2019 Audi RS3, built/sleeved motor. I’m told to use 5w40 oil in it. I was curious about redline 5w40 or 5w30 (I’m told redline runs thicker) so 5w30 may be ok to use. I was also looking into AMSOIL 5w40 euro fs or their 10w40 dominator. Does anyone have suggestions or information on these oils as to which would be a better choice. Thank you
2019 Audi RS3, built/sleeved motor - oil recommendation?
- Thread starter Josh0419
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All good. Add to options HPL.
HTHS of 5W30 is 3.7mpas. For comparison M1 0W40 is 3.6mpas. It is all about HTHS. Check HPL. It is very stout, true synthetic @TiGeo ia using it in EA888 on track.
You like the hpl 5w40 over redline. I drag race the car frequently as well.
If you drag race, go 5W30. I don’t use Redline oil or HPL. But, we have a lot of feedback from HPL users here and you can contact HPL directly.
I would go 5W30, something around 3.6mpas as you need less resistance for drag racing. You are not doing long track sessions, so less resistance means better performance. HPL Euro 5W30 as far as my memory serves me is 3.58.
Contact @High Performance Lubricants and check what they have to say.
Thank you, I’ll definitely check with them. I always heard the higher viscosity will offer better protection.
It is HTHS that matters!
HTHS Viscosity - Definition, viscosity, unit
What is the HTHS value for engine oil? Your lubricant experts from ADDINOL will give you additional information on viscosity and units.
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Difference Between Viscosity Grade vs HTHS Viscosity
Understanding differences between engine lubricant viscosities becomes more essential as the drive for improved fuel efficiency and GHG emissions continues.
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Here's the more important question: what does your engine builder want you to use? With a custom motor, it is probably best to use what your builder wants if you want any warranty support.
I would probably try 300V Competition 5W-40 if cost is no object. I’m sure the HPL is very good as well.
A budget option could be a 50/50 mix of M1 FS 0W-40 and 5W-50. One of their European engineers told me the additive package is the exact same for the SP versions and you can mix to get a desired viscosity and HTHS.
A budget option could be a 50/50 mix of M1 FS 0W-40 and 5W-50. One of their European engineers told me the additive package is the exact same for the SP versions and you can mix to get a desired viscosity and HTHS.
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Finally.It is HTHS that matters!
HTHS Viscosity - Definition, viscosity, unit
What is the HTHS value for engine oil? Your lubricant experts from ADDINOL will give you additional information on viscosity and units.
Difference Between Viscosity Grade vs HTHS Viscosity
Understanding differences between engine lubricant viscosities becomes more essential as the drive for improved fuel efficiency and GHG emissions continues.
You claim to detect that one oil of the same grade is “rougher and more sluggish”?
No.
This is bitog, we all believe we know better than the builder...
Will the engine builder know formulation of various oils or understand what the motor needs if the builder is given build specs of the motor to oil formula to make a best match.
The RS3 is a drag animal.
Exactly why as even i share that same thought, some builders legitimately don't know what's best. In the short time frame they'll run an engine it could have 10w-30 and it'll live long enough for something else to kill the engine so they'll believe it to be what should be used,
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