gear oil

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Nov 8, 2007 | 11:41 PM

05 super

Thread Starter

workin for parts!!!

Joined: Nov 2007

Posts: 1,540

Likes: 29

From: watson lake,yukon

gear oil

howdy all,i have a stupid? question. how much of a mileage increase would i see if i swapped to a 75w-90 gear oil versus the stock 75w-140 that ford puts in? i regularily drive at -30 to -40 celcius. thanx.

Nov 9, 2007 | 06:05 AM

calvin

Senior Member

Joined: Feb 2007

Posts: 339

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From: Canada

I really do not think you would notice a lot in mileage.I would maybe just put fresh stuff in that it calls for.....that is a newer truck....just my 2 cents worth.

Nov 9, 2007 | 07:43 AM

wde3477

Senior Member

Joined: Jul 2007

Posts: 3,805

Likes: 480

From: Cape Girardeau MO

Don't think that you would see any measurable mileage change.

However, you may wish to check with Ford as to whether there is a different viscosity range recommended for your region.