Viscosity - GC & Amsoil ASL 5w-30

[LSVTEC 91 Civic]

Whats the difference in the viscosity between GC and Amsoil 5w-30? How thick of a 30 weight is GC compared to Amsoil ASL? Thanks!

 

[buster]

About 1 cSt difference. Not even... 11.8 vs 12.6. Very little. Why? Are you one of these guy's that needs an oil that is EXACTLY 11.83423233 cSt to improve your wear by 2ppm? Just kidding.

 

[pscholte]

quote:

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Originally posted by buster: About 1 cSt difference. Not even... 11.8 vs 12.6. Very little. Why? Are you one of these guy's that needs an oil that is EXACTLY 11.83423233 cSt to improve your wear by 2ppm? Just kidding.

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Now, now Buster... (and it must be 12.5956775 cSt--I was pretty sure you knew that)

 

[Patman]

GC is around 12.2 cst at 100c

 

[Alan]

Both are thick 30W being more alike than different in that area.

 

[TooSlick]

You are all comparing the wrong viscosity HT/HS of GC is 3.6 Cp @ 150C HT/HS of ASL is 3.5 Cp @ 150C So these are basically the same, as are the VI's: GC is 179 ASL is 178 As a practical matter, these oils will flow about the same, unless the temps are well below 0F.... TS

 

[Alan]

Too Slick, Do you have info on the newer 05 version of GC that is reportedly brown?

 

[TooSlick]

Probably a version of Castrol SLX, Longlife II, 0w-30, unless it's still A3/B4 rated. A factory fill on many Vw/Audi engines - both gas and diesel. It's very easy to check - just do a VOA and look at the vis @ 100C. If it's < 11.0 Cst, it's an ACEA A5/B5 formulation like Mobil 1.... TS

 

[SSDude]

quote:

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Originally posted by TooSlick: Probably a version of Castrol SLX, Longlife II, 0w-30, unless it's still A3/B4 rated. A factory fill on many Vw/Audi engines - both gas and diesel. It's very easy to check - just do a VOA and look at the vis @ 100C. If it's < 11.0 Cst, it's an ACEA A5/B5 formulation like Mobil 1.... TS

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[pscholte]

Don't want it to be...

 

[LSVTEC 91 Civic]

quote:

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Originally posted by buster: About 1 cSt difference. Not even... 11.8 vs 12.6. Very little. Why? Are you one of these guy's that needs an oil that is EXACTLY 11.83423233 cSt to improve your wear by 2ppm? Just kidding.

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Yes, I am. The higher the cSt the lower the wear?