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Old 01-06-2008, 06:39 AM   #1
OrangeCrush1970
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Oil Weight?

What weight oil are you guys running in your trucks? I have been running Rotella 15w-40 in the warmer months and just switched to 10w-30 for my morning start ups. It's been in the 20's here in GA the past few mornings. I would like to know how light I can go. Would 5w-20 be too light for out engines? I have an early model built 350. Thanks guys-
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Old 01-06-2008, 07:41 AM   #2
WorkinLonghorn
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Re: Oil Weight?

Rarely gets into the 20s here. I use 10-30 all year now in pretty fresh 350. I used to go with 20-50 Castrol GTX in summer (100+ Deg.) I think 10-30 would be right for you too.
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Old 01-06-2008, 07:47 AM   #3
mrein3
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Re: Oil Weight?

In my truck, which gets a couple of starts per year at -10F and below, I run 10w30 year round.
My daily driver, a 94 Escort that gets a couple of starts per year at -20F and below, gets 5w30 year round.
The '04 Explorer I maintain for my wife gets 5w20 year round because that is what Ford specs for it.

I'd stick with 10w30 in the winter down there in an older 350. Or a newer 350 for that matter.
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Old 01-06-2008, 07:48 AM   #4
chevguy7
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Re: Oil Weight?

10-30 for both my C10 and Regal all year round
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Old 01-06-2008, 07:58 AM   #5
GREASEMONKEY72
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Re: Oil Weight?

i used to run 20-50 but i switched to rotella 15-40 for the zinc
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Old 01-06-2008, 08:38 AM   #6
OrangeCrush1970
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Re: Oil Weight?

Thanks fellas, thats what I wanted to hear. I'll stick w/ the 10w-30 until the temps creep back up.
Happy New Year!
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