New to forum! Low oil pressure. Need help!
Seasoned Member
Joined: May 2012
Posts: 436
Likes: 0
From: Ware Shoals, SC
Year: 1993
Model: Cherokee
Engine: 4.0L
Your pressure is right where it should be.
Change to a good filter!
I would run a bottle of marvel mystery oil in it and see if lifter frees up. May just be stuck.
I would not be pulling head or changing lifters just yet.
Change to a good filter!
I would run a bottle of marvel mystery oil in it and see if lifter frees up. May just be stuck.
I would not be pulling head or changing lifters just yet.
Senior Member
Joined: Jan 2012
Posts: 952
Likes: 4
Year: 2004
Model: Grand Cherokee
Engine: 2000 4.0
1. Take off the Fram filter and throw it as far as you can.
2. Put on Wix, Napa Gold, or Mopar. Refill with 10W-30, same brand as before, to bring it up to cold level. (40 is a little heavy for our Jeeps and not recommended). Don't drain the oil you just put in.
3. Bring your coolant up to cold level in reservoir and monitor.
4. Don't pull the head yet.
5. Don't use oil additives. Your engine does not need them.
6. Your oil pressure looks fine.
7. Driving your Jeep more may free up sticky and dry lifters.
2. Put on Wix, Napa Gold, or Mopar. Refill with 10W-30, same brand as before, to bring it up to cold level. (40 is a little heavy for our Jeeps and not recommended). Don't drain the oil you just put in.
3. Bring your coolant up to cold level in reservoir and monitor.
4. Don't pull the head yet.
5. Don't use oil additives. Your engine does not need them.
6. Your oil pressure looks fine.
7. Driving your Jeep more may free up sticky and dry lifters.
Thread Starter
Newbie
Joined: Aug 2013
Posts: 19
Likes: 0
Model: Cherokee
a full bottle of marvel mystery oil.
I'll update on Saturday, with exact readings after wix and m.m.o.
has been put into engine.
Do I run the m.m.o in engine until
my next oil change?
Last edited by Bambi956; Aug 5, 2013 at 10:21 AM.
CF Veteran
Joined: Jan 2011
Posts: 1,648
Likes: 0
From: Havana fl
Year: 1995
Model: Cherokee
Engine: 4.0L
A blown head gasket/ cracked head will not always show a missfire, smoke or anything noticeable at all, besides a intermittent loss of coolant. Your "mechanic" sounds like he's not to up and up. Do what is already stated, your oil pressures seem fine. I personally run a different oil, but that's preference, and on the filter also..
Seasoned Member
Joined: May 2012
Posts: 436
Likes: 0
From: Ware Shoals, SC
Year: 1993
Model: Cherokee
Engine: 4.0L
Does not matter what oil you use, it will never free up a stuck lifter. Two things that are proven to do that safely is MMO or ATF. You replace a quart of oil with either and run 500 miles. Then do fresh oil change.
Just because a lifter sticks, doesn't mean it is bad. Neither of these will hurt the motor in anyway. If it frees the lifter, then your good. If not, then you look at replacement of lifters.
CF Veteran
Joined: Aug 2009
Posts: 5,676
Likes: 301
From: WV
Year: '96
Model: Cherokee
I've been using MMO for as long as it's been around and sware by it. He can use it. Won't hurt a thing.
Oil choice around here is a bit opinionated but in a friendly kinda way. MAIN THING is a GOOD filter. I use Rotella T6(synthetic)with a NAPA Gold filter in both my vehicles. In fact I'm getting ready to do my uncles 98 Durango with the same. I picked a few extra lbs of oil pressure at crusing speeds and it idles smoother. Some say it quites their motors down but mine's not noisy so I can't comment on that. Good cleaning and lubricating properties that these old design motors(some here call them"tractor motors") need.
Oil choice around here is a bit opinionated but in a friendly kinda way. MAIN THING is a GOOD filter. I use Rotella T6(synthetic)with a NAPA Gold filter in both my vehicles. In fact I'm getting ready to do my uncles 98 Durango with the same. I picked a few extra lbs of oil pressure at crusing speeds and it idles smoother. Some say it quites their motors down but mine's not noisy so I can't comment on that. Good cleaning and lubricating properties that these old design motors(some here call them"tractor motors") need.
Last edited by EZEARL; Aug 5, 2013 at 02:24 PM.
Thread Starter
Newbie
Joined: Aug 2013
Posts: 19
Likes: 0
Model: Cherokee
Sorry, but disagree. MMO has been proven over 50 years of use. It is safe and will help with a stuck lifter.
Does not matter what oil you use, it will never free up a stuck lifter. Two things that are proven to do that safely is MMO or ATF. You replace a quart of oil with either and run 500 miles. Then do fresh oil change.
Just because a lifter sticks, doesn't mean it is bad. Neither of these will hurt the motor in anyway. If it frees the lifter, then your good. If not, then you look at replacement of lifters.
Does not matter what oil you use, it will never free up a stuck lifter. Two things that are proven to do that safely is MMO or ATF. You replace a quart of oil with either and run 500 miles. Then do fresh oil change.
Just because a lifter sticks, doesn't mean it is bad. Neither of these will hurt the motor in anyway. If it frees the lifter, then your good. If not, then you look at replacement of lifters.
Thread Starter
Newbie
Joined: Aug 2013
Posts: 19
Likes: 0
Model: Cherokee
I've been using MMO for as long as it's been around and sware by it. He can use it. Won't hurt a thing.
Oil choice around here is a bit opinionated but in a friendly kinda way. MAIN THING is a GOOD filter. I use Rotella T6(synthetic)with a NAPA Gold filter in both my vehicles. In fact I'm getting ready to do my uncles 98 Durango with the same. I picked a few extra lbs of oil pressure at crusing speeds and it idles smoother. Some say it quites their motors down but mine's not noisy so I can't comment on that. Good cleaning and lubricating properties that these old design motors(some here call them"tractor motors") need.
Oil choice around here is a bit opinionated but in a friendly kinda way. MAIN THING is a GOOD filter. I use Rotella T6(synthetic)with a NAPA Gold filter in both my vehicles. In fact I'm getting ready to do my uncles 98 Durango with the same. I picked a few extra lbs of oil pressure at crusing speeds and it idles smoother. Some say it quites their motors down but mine's not noisy so I can't comment on that. Good cleaning and lubricating properties that these old design motors(some here call them"tractor motors") need.
Thread Starter
Newbie
Joined: Aug 2013
Posts: 19
Likes: 0
Model: Cherokee
I've been using MMO for as long as it's been around and sware by it. He can use it. Won't hurt a thing.
Oil choice around here is a bit opinionated but in a friendly kinda way. MAIN THING is a GOOD filter. I use Rotella T6(synthetic)with a NAPA Gold filter in both my vehicles. In fact I'm getting ready to do my uncles 98 Durango with the same. I picked a few extra lbs of oil pressure at crusing speeds and it idles smoother. Some say it quites their motors down but mine's not noisy so I can't comment on that. Good cleaning and lubricating properties that these old design motors(some here call them"tractor motors") need.
Oil choice around here is a bit opinionated but in a friendly kinda way. MAIN THING is a GOOD filter. I use Rotella T6(synthetic)with a NAPA Gold filter in both my vehicles. In fact I'm getting ready to do my uncles 98 Durango with the same. I picked a few extra lbs of oil pressure at crusing speeds and it idles smoother. Some say it quites their motors down but mine's not noisy so I can't comment on that. Good cleaning and lubricating properties that these old design motors(some here call them"tractor motors") need.