"Gear Oil Weight"
Thread Starter
|
Junior User
Joined: Apr 2002
Posts: 99
Likes: 0
"Gear Oil Weight"
[updated:LAST EDITED ON 08-Jul-02 AT 03:44 PM (EST)]Hi,
I have a 1990 F150,302, 2wd.
I needed to change the oil in the differential but when I went to get the oil they had different weights.
How do I know what weight to use?
Is Synthetic gear oil better than conventional?
Can my year truck take synthetic oil?
How much oil do I need to fill it back up?
I have a 1990 F150,302, 2wd.
I needed to change the oil in the differential but when I went to get the oil they had different weights.
How do I know what weight to use?
Is Synthetic gear oil better than conventional?
Can my year truck take synthetic oil?
How much oil do I need to fill it back up?
Junior User
Joined: May 2002
Posts: 80
Likes: 0
From: Plano, Tx
"Gear Oil Weight"
80W-90 is a good all around weight. If you do a lot of towing/hauling you might wanna go w/ the thicker stuff (~140). Synthetic isnt really necessary, GM products use it from the factory but there are plenty of vehicles that made it plenty of thousands of miles w/o synthetic. The 8.8 shouldnt hold more than 2 even if its completely drained.
Texas A&M Off-Road
`95 F150 4x4 5.0
33" BFG KMs
Texas A&M Off-Road
`95 F150 4x4 5.0
33" BFG KMs
Postmaster
Joined: Mar 2001
Posts: 4,968
Likes: 3
From: So Cal
"Gear Oil Weight"
I like syn but I don't really think it is required for most differentials. 80W90 is a good general lube unless you are in hot country or tow heavy loads, then maybe one of the heavier weights is better.
If you have an owners manual follow their recommendation.
If you have a limited slip you probably will also need a bottle or tube of limited slip additive. I use the Sta Lube brand which meets Ford spec. I also use Mobil 1 synthetic, but like I said I think it is overkill, but then again I tow a heavy traile so any imagined margin of safety makes me feel better.
Jim Henderson
PETA(people eating tasty animals)
If you have an owners manual follow their recommendation.
If you have a limited slip you probably will also need a bottle or tube of limited slip additive. I use the Sta Lube brand which meets Ford spec. I also use Mobil 1 synthetic, but like I said I think it is overkill, but then again I tow a heavy traile so any imagined margin of safety makes me feel better.
Jim Henderson
PETA(people eating tasty animals)
Elder User
Joined: Sep 2000
Posts: 936
Likes: 0
From: Bay area
"Gear Oil Weight"
I have a 78, I used 85w140 in everything except the engine what gets 20w50.
I do alot a serious duty crawling and put alot of stress on everything. excessive idling as well.
if I did not do any of this, I would still use 85w140 in some places. it is recommended from the factory.
if your running a newer vechile 80w90 is just fine. but checking the owners manual is the best bet for the right lubes.
I do alot a serious duty crawling and put alot of stress on everything. excessive idling as well.
if I did not do any of this, I would still use 85w140 in some places. it is recommended from the factory.
if your running a newer vechile 80w90 is just fine. but checking the owners manual is the best bet for the right lubes.
