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Unread 02-14-2003, 11:46 AM   #1
UPnOVER
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Join Date: Jul 2002
Location: west
Posts: 439
How much oil

How much oil are you running in your 91' 4.0L I6.
I am reading something that said to put in 5qt's in then add per what the dip stick reads and I have just been putting in 6qt. I have to ask 5+or 6.

Thanks.

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Last edited by UPnOVER; 02-14-2003 at 12:39 PM..
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Unread 02-14-2003, 01:05 PM   #2
4wheeler4CJ
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Join Date: Mar 2002
Location: Southern Rhode Island
Posts: 1,527
My '96 ends up about 5 1/2 to 6. I put 5 then adjust up from there.

You really shouldn't overfill it too much, or the crank lobes will splash it too much, causing it to froth up and not pump thoroughly, as well as causing extra resistance/drag.

However, 6 quarts will not overfill it much anyway, and it would be safe to just dump 6 in off the bat and be done. The 4.0 and 4.2 blocks are high capacity. Before you put your new filter on, put some in it from your 1st quart so you arent starting it up totally dry.....it will take less time to get oil pressure that way.
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