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Junior User
Joined: Oct 2007
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From: Texas
oil
i know there are severl threads on this issue, but i run 15w40 valvoline Synthetic in my 02 f250 7.3L 140K - is it recomended to run a 5w40 in the winter or stay with what i have year round?
Post Fiend
Joined: Jun 2004
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From: Parker, CO
Since you're in Texas, you can get away with 15w40 year round.
Are you just running the plain Valvoline Synthetic, or are you using the Valvoline Blue? The regular synthetic is not diesel rated, but the Blue product lineup is specifically for diesel engines.
Are you just running the plain Valvoline Synthetic, or are you using the Valvoline Blue? The regular synthetic is not diesel rated, but the Blue product lineup is specifically for diesel engines.
Post Fiend
Joined: Feb 2007
Posts: 14,541
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From: Dallas-Ft. Worth
It depends where in TX you are. I don't have *problems* per se, but I definitely notice the difference in starts, noise, and smoothness with the 5W-40 syn. I would agree that if you're in south TX, the 15W-40 should be good all year, but in the Panhandle, North Texas, or West Texas, it gets cold enough to warrant syn, IMHO.
FWIW, I run Syn all year (Rotella), but I think I'm about to give Schaeffer's a go. I'm going to order some ATF, so I figured I try the 9000 while I was at it...
FWIW, I run Syn all year (Rotella), but I think I'm about to give Schaeffer's a go. I'm going to order some ATF, so I figured I try the 9000 while I was at it...
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Junior User
Joined: Oct 2007
Posts: 80
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From: Texas
Originally Posted by Pocket
Since you're in Texas, you can get away with 15w40 year round.
Are you just running the plain Valvoline Synthetic, or are you using the Valvoline Blue? The regular synthetic is not diesel rated, but the Blue product lineup is specifically for diesel engines.
Are you just running the plain Valvoline Synthetic, or are you using the Valvoline Blue? The regular synthetic is not diesel rated, but the Blue product lineup is specifically for diesel engines.
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Junior User
Joined: Oct 2007
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From: Texas
Originally Posted by Izzy351
It depends where in TX you are. I don't have *problems* per se, but I definitely notice the difference in starts, noise, and smoothness with the 5W-40 syn. I would agree that if you're in south TX, the 15W-40 should be good all year, but in the Panhandle, North Texas, or West Texas, it gets cold enough to warrant syn, IMHO.
FWIW, I run Syn all year (Rotella), but I think I'm about to give Schaeffer's a go. I'm going to order some ATF, so I figured I try the 9000 while I was at it...
FWIW, I run Syn all year (Rotella), but I think I'm about to give Schaeffer's a go. I'm going to order some ATF, so I figured I try the 9000 while I was at it...
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