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Dec 29, 2013 | 03:38 PM

F10076

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Oils

What kinds of oil do you guys use? Engine oil, transmission, transfer case, axle?

76 f100 with a 360. Only used in mild/warm weather.

Dec 29, 2013 | 04:03 PM

Dave145

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From: Burlington, WI

Engine oil: Mobil1 10w40

Trans fluid: The generic Dex/Merc fluid from the hardware store (will switch to Type F fluid when I rebuild the trans)

Axle grease: Mopar limited slip fluid

Dec 29, 2013 | 06:22 PM

Rusty_Old_F250

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From: Western Washington

Engine: Amsoil 20w50 Z-Rod

Trans: Amsoil 75w90

Diff: generic 80w90, soon to be amsoil 75w140

Sam

Dec 29, 2013 | 06:53 PM

Dave145

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From: Burlington, WI

Quote:

Originally Posted by Rusty_Old_F250

Engine: Amsoil 20w50 Z-Rod

Trans: Amsoil 75w90

Diff: generic 80w90, soon to be amsoil 75w140

Sam

20wt50? Wow if that were in my truck up here in Wisconsin (its about 9 degrees now), my truck wouldn't turn over!

Dec 29, 2013 | 06:59 PM

gatorfor88

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Joined: Jan 2013

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From: Panama City

I use mobil1 full synthetic for all fluids. It costs a little more initially but doesnt need changing nearly as often. And the inside of my engine looks like new.

Dec 29, 2013 | 08:44 PM

Rusty_Old_F250

Fleet Mechanic

Joined: Aug 2009

Posts: 1,771

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From: Western Washington

Quote:

Originally Posted by Dave145

20wt50? Wow if that were in my truck up here in Wisconsin (its about 9 degrees now), my truck wouldn't turn over!

It's doesn't get very cold around here, its 44* outside now.

If it gets much colder I would switch to 10w40.

Sam

Dec 29, 2013 | 08:45 PM

Dave145

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Joined: Nov 2011

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From: Burlington, WI

Damn lucky you. Ha the 10w40 I have in my truck is considered "engine honey" up here. There are days when its so cold that even that tries to keep the engine from turning over.

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Dec 29, 2013 | 09:16 PM

Dave145

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Joined: Nov 2011

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From: Burlington, WI

Hmm that is pretty cool! Right now I'm waiting with changing my oil...I just changed it roughly a month ago so its pretty new. Gotta love winter time though. Even our spare jeep and my moms caravan have issues with their oil (5w30) gumming up.

Dec 29, 2013 | 09:27 PM

#10

Blue and White

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Engine Oil: Shell Rotella T 15W40. Newer car oils lack the zinc extreme pressure additives our flat tappet cam engines need to stay healthy. Zinc is hard on catalytic converters so it came out. Diesel engine oil has it, Mobile 1 20w-50 has it, classic car oils like Joe Gibbs have it or you can buy ZDDP (zinc) supplement for regular car oil. (Google). You are looking for 1100-1300 PPM zinc for a mild flat tappet engine. Current car oil has ~600-700 PPM. I like the Rotella because its readily available and not too expensive. I have used Rotella 5w40 synthetic for extreme cold weather.

Transfer Case (gear type): 80w-90 gear lube. Parts store brand.

Front and Rear Diff: 80w-90 gear lube.