synthetic or no?
Thread Starter
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Senior User
Joined: Jul 2009
Posts: 218
Likes: 1
From: Ashland, Mississippi
synthetic or no?
2005 6.0L FX4, 150,000 miles. Should I go synthetic or leave it dino? Gets cold here in winter, sometimes 5-15 below but going into summer when it gets real hot here. Is pretty normal to be 100 pplus during the day then 40 or so at night.
Thread Starter
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Senior User
Joined: Jul 2009
Posts: 218
Likes: 1
From: Ashland, Mississippi
Sorry I should add the reason I asked to start with. Im a bit worried about the cold winters. Will my truck start when its -10 and snow over the whole truck? My kids have always been able to say dads truck will make it.
Post Fiend
Joined: Oct 2005
Posts: 10,626
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From: Plano TX and Brentwood TN
That would depend on the individual circumstances. Some have even claimed that their truck "felt" a little worse when using Syn versus dino. Don't know if that's true or not, but that's all I have to go by.
I know the differences have been better for me. Much better cold starts and I'm able to go further between changes. Not everyone can, it just depends on how heavy the truck is worked.
I know the differences have been better for me. Much better cold starts and I'm able to go further between changes. Not everyone can, it just depends on how heavy the truck is worked.
Senior User
Joined: Dec 2010
Posts: 337
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2 things that worry me bout switching is 1...I've always been told when you switch to synthetic you can't go back to conventional. And 2nd my truck (bought used) has high miles and hate to ruin truck by switching to synthetic. But I've read numerous threads on switching doesn't hurt and helps with winter start ups.
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Elder User
Joined: Aug 2003
Posts: 933
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From: Québec
No problem, the dealer here up north swicth from 15w40 reg. oil to 0w30 synth. in winter. It does make a big difference at minus 20.
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Elder User
Joined: Feb 2011
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Please, please, please run conventional 15w-40 in your truck all year. Then, I'll be able to read you "Effin Ford! My 6.0 doesn't start, then bucks and spews smoke for ten minutes when I start it at -15F." thread next winter.\
I can always use a laugh.
I can always use a laugh.