Difference between 5w30/10w30
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Junior Member
Joined: May 2004
Posts: 32
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Car: 1985 IROC-Z Z/28
Engine: Brand new GM 350
Transmission: Stock (for now)
Difference between 5w30/10w30
Just had a new 350 put in 10,000 miles ago and it's time to go to synthetic oil. I went to the shop that did the swap for me and they gave me 6 quarts of 5w30 when the engine oil plug actually says 10w30 on it. What is the difference between the two and will I be hurting anything by using the 5w30 instead of 10w30?
Go Royal Purple
Go Royal Purple
TGO Supporter
Joined: Jul 2003
Posts: 4,803
Likes: 2
From: Grand Rapids, MI
Car: Z28
Engine: Sb2.2 406
Transmission: Jerico 4 speed
Axle/Gears: Ford 9" 3.60
This sums it up pretty well: http://www.vtr.org/maintain/oil-overview.html
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