Recent Topics
How bad is this?
by cnl64590
23 minutes 0 seconds ago
Mag1 or ST Dino: what would YOU use?
by car51
50 minutes 1 second ago
Ustria?
by Pontual
Today at 11:48 AM
Georgia bans 71 oils from 29 brands
by Tom NJ
Today at 11:27 AM
Trying to send a Blackstone sample
by 15SilvyEcotec
Today at 11:10 AM
2005 Trailblazer getting a new engine
by The_Eric
Today at 11:02 AM
AAP: 5 qt Castrol Edge, Boss filter, $30 PP $33
by DoubleWasp
Today at 10:48 AM
Make own external backup?
by doitmyself
Today at 10:33 AM
What should I use for my next oic?
by dan_erickson
Today at 10:25 AM
Motul Sport Ester 5w40 vs Gulf Competition 5w40
by Brit33
Today at 10:12 AM
M1 0W-20 EP / 15,745 mi oci / 2004 Honda Accord V6
by vinu_neuro
Today at 09:58 AM
Recommend me a small 12v battery.
by dlundblad
Today at 09:22 AM
Newest Members
rsritchey, Ball9320, 06Corolla, AyPapii, JakeTheYankee
56834 Registered Users
Who's Online
89 registered (BobFout, b1amgm47, beetleything, 05LGTLtd, 2015_PSD, Bandito440, 6 invisible), 1897 Guests and 194 Spiders online.
Key: Admin, Global Mod, Mod
Forum Stats
56834 Members
66 Forums
244313 Topics
3977882 Posts

Max Online: 2862 @ 07/07/14 03:10 PM
Donate to BITOG
Page 2 of 2 < 1 2
Topic Options
#3331390 - 04/02/14 01:03 PM Re: What straight wt oil to try for 2000 RHD Cherokee [Re: Raye7r]
Papa Bear Offline


Registered: 08/11/05
Posts: 6394
Loc: Leamington, ON, Canada ..... r...
Originally Posted By: Raye7r
The oil light started coming on this winter.


Does it knock? Is it running OK?

If it's running alright then leave it alone and drive on.
_________________________

I'm not too bright - old age and forgetfulness complicate things as well" ..???
I would agree with you but then we'd both be wrong


Top
#3331536 - 04/02/14 03:51 PM Re: What straight wt oil to try for 2000 RHD Cherokee [Re: Raye7r]
Raye7r Offline


Registered: 02/09/09
Posts: 11
Loc: Indiana
I'v changed the sender twice, it has a gauge also. Will have checked with mechanical gauge. Light just started coming on. Mail delivery vehicle so has a ton of idling time on it (5 hours to a hundred miles). Just called my NAPA and told them to bill me for a case of 15w50. No rattles, even when light on. Rattles good on startup though. Been a good one. You think new oil pump will help if pressure low.

Top
#3331582 - 04/02/14 04:57 PM Re: What straight wt oil to try for 2000 RHD Cherokee [Re: Raye7r]
eljefino Offline


Registered: 06/15/03
Posts: 28637
Loc: ME
You guys are on the wrong track with the right idea. wink

OP needs to either pull his thermostat or put in a 150-160 degree one. This will thicken up the oil more than going up a grade. Those jeeps have a mechanical and electric fan, IMO. Wire up the electric to be always on.

Top
#3331675 - 04/02/14 07:01 PM Re: What straight wt oil to try for 2000 RHD Cherokee [Re: Raye7r]
bullwinkle Offline


Registered: 10/09/04
Posts: 5298
Loc: Cincinnati, OH, USA
20W50 and a can or two of STP will raise it-but verifying actual low oil pressure would be a smart move.
_________________________
06 Ram 3500 CTD 4X4 48RE SRW, 93 GMC C3500 6.2 diesel, 89 F-450 7.3 IDI, 98 Cherokee 4.0, 05 Scion xB, 15 Transit 250 3.7

Top
#3332068 - 04/03/14 08:51 AM Re: What straight wt oil to try for 2000 RHD Cherokee [Re: Raye7r]
rslifkin Offline


Registered: 06/27/10
Posts: 2658
Loc: Rochester, NY
On a 2000, the head probably cracked when it got hot (0331 head). Has it been losing coolant? If so, the bearings in the bottom end are probably shot if it's got low oil pressure, as the coolant has likely wiped them out.

If the oil isn't milky, no slime under the oil cap and it hasn't been losing coolant, then verify the pressure with a mech gauge and replace the oil pump if it's actually low (worn out oil pumps aren't uncommon on high mileage 4.0s).


Edited by rslifkin (04/03/14 08:52 AM)
_________________________
1998 Jeep Grand Cherokee 5.9 Limited with lots of mods (201k miles, bought with 100k in 1/2010)
Rotella T6 @ 6k OCI

Top
#3332125 - 04/03/14 09:42 AM Re: What straight wt oil to try for 2000 RHD Cherokee [Re: rslifkin]
jeepman3071 Offline


Registered: 04/15/10
Posts: 2152
Loc: Storrs, Connecticut
Originally Posted By: rslifkin
On a 2000, the head probably cracked when it got hot (0331 head). Has it been losing coolant? If so, the bearings in the bottom end are probably shot if it's got low oil pressure, as the coolant has likely wiped them out.

If the oil isn't milky, no slime under the oil cap and it hasn't been losing coolant, then verify the pressure with a mech gauge and replace the oil pump if it's actually low (worn out oil pumps aren't uncommon on high mileage 4.0s).


This. thumbsup
_________________________
2000 Jeep Cherokee Sport 4.0L (161k) - PYB 5w30, Napa Gold 1516, Magnefine trans filter

Top
#3332273 - 04/03/14 12:36 PM Re: What straight wt oil to try for 2000 RHD Cherokee [Re: Raye7r]
Miller88 Offline


Registered: 04/09/08
Posts: 10171
Loc: Onondaga County
A lot of times, 4.0s will run hot enough to evaporate the coolant so you don't end up with the milk on the oil cap ... even with a cracked head.
_________________________
I run the 10w30 becuase 0w20 makes my CVT shift funny

Top
#3332280 - 04/03/14 12:42 PM Re: What straight wt oil to try for 2000 RHD Cherokee [Re: Miller88]
rslifkin Offline


Registered: 06/27/10
Posts: 2658
Loc: Rochester, NY
Originally Posted By: Miller88
A lot of times, 4.0s will run hot enough to evaporate the coolant so you don't end up with the milk on the oil cap ... even with a cracked head.


Huh. When my mom's cracked the head, it had almost a 1/2" of slime under the valve cover and on the oil cap and valvetrain after a couple hundred miles (she noticed it losing coolant, I checked it out and found it before any lasting damage was done). It took forever to clean it all up before reassembly.
_________________________
1998 Jeep Grand Cherokee 5.9 Limited with lots of mods (201k miles, bought with 100k in 1/2010)
Rotella T6 @ 6k OCI

Top
#3332443 - 04/03/14 03:15 PM Re: What straight wt oil to try for 2000 RHD Cherokee [Re: Raye7r]
Donald Offline


Registered: 03/21/04
Posts: 16042
Loc: Upstate NY
Have you changed the oil filter since the light started to come on? If not that would be the first thing to do.

I had a 1994 Camry where the oil light would come on. Mechanical gauge confirmed oil pressure issues. Changed only the filter (Amsoil) and problem went away. Amsoil evaluated the filter and said the filter was full, but not defective. So unknown problem with a top quality filter.

Put on another 100K miles and never any more issues.
_________________________
2015 Subaru Forester 2.5 engine/CVT PP & M1
2001 Jeep Grand Cherokee Laredo 4.0 - PP & M1
1999 Dodge Ram 2500 w/Cummins - Rotella T6 & M1


Top
#3332806 - 04/03/14 09:54 PM Re: What straight wt oil to try for 2000 RHD Cherokee [Re: Raye7r]
artificialist Offline


Registered: 09/23/07
Posts: 7858
Loc: Florida
If you really need an SAE40, you can probably get it at a marina because many boats still have a Detroit Diesel 2-cycle engine which needs SAE40.

I wouldn't use STP, approved oil already has the additives that are needed.
_________________________
2010 Lancer Ralliart Sportback

Top
#3333343 - 04/04/14 02:27 PM Re: What straight wt oil to try for 2000 RHD Cherokee [Re: Raye7r]
circuitsmith Offline


Registered: 12/17/09
Posts: 303
Loc: Wash, DC
If it's not the sender it's most likely worn main crank bearings causing low pressure at idle.
How many of you saying change the oil pump have actually seen a high mileage & low pressure problem fixed with a new pump?
The pump is low, closest to the sump so it's the last part to get starved of oil.
Normally it's constantly bathed in the oil at its coolest.
_________________________
2006 Toyota Matrix 5-sp. 1zz-fe 5000mi/12mo OCI
Any major brand dino 5w-30 on sale

Top
#3333467 - 04/04/14 04:42 PM Re: What straight wt oil to try for 2000 RHD Cherokee [Re: Raye7r]
andyd Offline


Registered: 09/25/04
Posts: 4606
Loc: Marshfield , MA
The rattle on cold start up. Thats a worn thrust bearing on the crank. It prolly has a few miles left.But it is showing wear. I would switch to 20 w 50. I use it down to 10F in my cars which are specced for it.
_________________________
1988 BMW 528e 20w50 dino, STP filter

1994 Ranger ,the Rat, 5w30 dino, STP filter

'09 Camry SE, Valvoline bulk 5w30 and ? filter

Top
Page 2 of 2 < 1 2