10W30 or 5W30 ?
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Senior User
Joined: Nov 2005
Posts: 209
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10W30 it will be....
Thanks for all the input on the 5 vs.10. I will keep using what the original owner used which is the 10W30.
5 vs 10 in the summer is not that much diff. when our summers are HOT.
If it gets down to 0 degrees .... I'll be staying home and the truck will stay in its heated garage.
Y'all have a great day. >>>>Happy Veterans Day<<<<
Cargo Master
Joined: Apr 2003
Posts: 2,058
Likes: 424
From: Too close to Houston
I think Ford actually recommends 5W20 for all the V10's. I know my owners manal (2000) calls for 5W30, but a service bulletin was issued recommending the 5W20 retroactively.
Side note: Remember when it was universally accepted that 10W40 was crap and not to be used in anything? Still is thought of in those terms, I believe. Anyway, the reasoning was that the 10W40 had too much viscosity modifier in it to get the 4:1 ratio. It was argued that you should never exceed a 3:1 ratio and thus the 10W30 oils were in vogue. Now people will recommend the 5W30 oils (with a ratio of 6:1 !!!) and not bat an eye. What gives?
Side note: Remember when it was universally accepted that 10W40 was crap and not to be used in anything? Still is thought of in those terms, I believe. Anyway, the reasoning was that the 10W40 had too much viscosity modifier in it to get the 4:1 ratio. It was argued that you should never exceed a 3:1 ratio and thus the 10W30 oils were in vogue. Now people will recommend the 5W30 oils (with a ratio of 6:1 !!!) and not bat an eye. What gives?
...Again Thanks! Gotta get to work...
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