Pennz yb 10W40 vs Pennz Gold 15W40

Joined
Dec 30, 2006
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Dallas,Tx USA
When I do my oci this winter,I may use a 40 weight. Whats the main difference between yellow bottle 10W40 and 15W40 Gold? Just the fact that it`s an HDEO and maybe the 15W? I plan on staying with a Pennzoil dino.
 
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Aug 30, 2007
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Bonnyville, AB
The 15W-40 Gold has an HT/HS comparable to a 20W-50, while as the 10W-40 is not much thicker than a 10W-30. The 15W-40 will be a better oil unless you get into freezing weather, which in South Texas is not uncommon. I'd personally run a good 15W-40 HDEO in that engine year round.
 
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Jan 20, 2003
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East of IGO
My wifes Ford Super duty manual lists 15w/40 oils down to 15*F[so does the john Deere manual for a Yanmar diesel engine]. Can't get a better protecting oil than a HDEO type .
 
Joined
Apr 12, 2006
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Alberta
The 15W-40 will have less VII's (lower viscosity spread) and since it is a HDEO, it will have a more robust additive package. In hot conditions it will be superior to the 10W-40.
 
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