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thats right
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they are both the exact same at higher temps :read:

hence the -30w :crazy:

the difference is in their viscosity at startup. GM says to use 5w-30 so i would use that. once you are warmed up they will behave the same pretty much
 

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[>
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Yea Jeff hit it on the head.

The # before the W is the cold weight the number after is the operating temp weight.

I use 5w30 b/c that is what the manual says. Alot run 10w30 whitch is fine as long as you are not in a cold environment where the 10 would be to thick as startup to protect like it should.
 

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Yeah here in the dirty south we use 10w30. If I lived farther morth I'd use 5
 

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Not sure but I believe the 5w is more for up north use in colder climates. I live in Texas and have always been told and have always used Mobil 1 10w-30 in mine.
 

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WorkinSmarterNotHarder
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450 Posts
Jeff said:
when did you move to florida memo? :LOL:
:LOL: Didn't tell me about it, I saw him this morning. He got his nicknames confused.
 
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