asking what is best oil weight to use for summer on 94 xj with inline 6
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Newbie
Joined: Feb 2017
Posts: 10
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Year: 1993
Model: Cherokee
Engine: 4.o
asking what is best oil weight to use for summer on 94 xj with inline 6
i would like to know which is the best oil weight to use on a inline six with 155k on it put new 10w-30 in it but on idle it drops to 10 to 20 lbs oil pressure when warm out side. any ideas
Member
Joined: Jul 2010
Posts: 182
Likes: 1
From: nanticoke pa
Year: 2000
Model: Cherokee
Engine: 4.o
189k miles valvoline maxlife 10x30 all year long with extended oil change periods because it does not get that dirty at 3k buy at walmart 5 qt. container MY 2 CTS. used since 7/2010 in pa.
CF Veteran
Joined: Jul 2012
Posts: 3,135
Likes: 360
From: Andover, VT
Year: 1999
Model: Cherokee (XJ)
Engine: 4.0 L
FSM calls out 10w-30 for temps never above 100 deg F and 05w-30 for temps never below 0 deg F. I usually run 5w in the summer and 10w in the winter.
The pressure seems low. The FSM calls for a minimum of 13psi at idle plus 10psi per 1000rpm.
The factory gauge on the dash can be inaccurate. I suggest doing an oil change with the proper weight oil and checking your pressure with a mechanical gauge to get an accurate reading.
The pressure seems low. The FSM calls for a minimum of 13psi at idle plus 10psi per 1000rpm.
The factory gauge on the dash can be inaccurate. I suggest doing an oil change with the proper weight oil and checking your pressure with a mechanical gauge to get an accurate reading.
