Does GC meet GM 6094M spec?

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7,550
Location
North Alabama
No, GC does not specifically meet that GM spec. Syntec 5w30 & 10w30 are the only Syntec grades that carry the GM 6094M spec. It's probably because GC is geared toward the European crowd. [I dont know] Read the label on the back of the GC bottle & you'll see what I mean. I'm sure GC would pass the GM 6094M spec, but since no American cars (that I'm aware of) call for 0wXX oils, Castrol probably figured "Why bother with the GM spec?"
 
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22,188
Location
Colorado Springs
6094M is for 10w-30 only I think. It's not a tought spec at all, EVERY single SL/GF-3 oil met it. It requires no more than like 50,000 Cp at -30C for cold pumping. Most GF-4 10w-30s are well below 20,000. I think it just makes it so Joe Bob doesn't fill his crankcase with 1980 10w-30, which would be near the pumping and cranking limits allowed by the API.
 

novadude

Thread starter
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1,539
Location
Shippensburg, PA
That spec is for 5W-30 too. The owners manual on my new Colorado specifies that you must use 5W-30, and it must meet that spec. I suspected GC is fine, but figured I'd ask anyway. [Smile]
 
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