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#4468516 - 07/23/17 11:19 PM Oil for 2002 Jeep Grand Cherokee v8
justn Offline


Registered: 07/18/17
Posts: 4
Loc: California
Hello all, I'm new here and looking for an oil recommendation for my 2002 Grand Cherokee with the 4.7l v8. It currently has 162,000 miles on the odometer.

Owners manual says 5W-30 viscosity is preferred with the API symbol. It also lists 10W-30 for temperature ranges from 0 F to 100F and above. The 5W-30 recommendation is for a temperature range of -20F and below to 100F

The manual also suggests a drain interval of 3,000 miles or 7,500 miles. I know I meet the 3,000 mile requirements due to my stop and go driving in the city, sometimes dusty roads when off-roading, and driving in hot weather above 90F.

I live in California's central valley, where it is very hot in the summers, usually 100F and hotter for weeks at a time. The winters get cooler, but never below freezing. However, I will sometimes make trips up to my local mountains where we do get snow.

My driving style is moderate, stop and go city driving, with sections on highways. I will get into the throttle getting on the highway. My daily drive is 10 miles to work which consists of a 50/50 split of highway cruising and city streets.

I believe my Jeep is burning oil. It goes through about 2 quarts every 1,000 miles.

I had been using Mobil1 5W-30 full synthetic, and then moved topping my oil off with the high mileage version. I just bought some Valvoline Max Life 5W-30 oil to continue topping it off with, which is a semi-synthetic. I have also been using a drain interval of 7,000 miles with a standard Wix filter.

I don't really care about full synthetic vs semi-synthetic vs dino oil.

My main question is, what oil should I run? Also, would it be worth changing to a 10W-30 for the hot summers or full time, even though my owners manual says 5W-30 is preferred?

Thanks!

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#4468525 - 07/23/17 11:31 PM Re: Oil for 2002 Jeep Grand Cherokee v8 [Re: justn]
Nick1994 Online   content


Registered: 02/19/13
Posts: 10322
Loc: Phoenix, AZ
That's a lot of oil burning. MaxLife 10w40 or Mobil 1 HM 10w40 is what I'd run for 7,500 miles.
_________________________
2015 Hyundai Sonata 2.4L 81k Mobil 1 AFE 0w30 & OEM
2000 Toyota Camry 2.2L 229k Valvoline & Fram Ultra
1996 Jeep Cherokee 4.0L 146k Mobil 1 HM 10w40 & Fram Ultra

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#4468526 - 07/23/17 11:35 PM Re: Oil for 2002 Jeep Grand Cherokee v8 [Re: justn]
zrxkawboy Offline


Registered: 11/30/04
Posts: 1770
Loc: SD
I would run a name-brand High Mileage 10W30 oil.
_________________________
"Think of all the Ford owners who will someday want an automobile." John Dodge


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#4468540 - 07/24/17 12:14 AM Re: Oil for 2002 Jeep Grand Cherokee v8 [Re: justn]
Dyusik Offline


Registered: 09/26/14
Posts: 2015
Loc: US-WA
I'm sure in Maine 5w30 would be preferred, but you should not worry about a 10 or 15w in your climate. I would just run a 10w, preferably a low zinc formulation with that much oil out the tail pipe, Cali emissions and all. A hm oil is worth a try, a heavy weight will not hurt a bit either. With a 7k interval a syn blend will suffice, many dino oils will as well. Defiantly top off with dino, and / or stretch the interval.
My 2c.
_________________________
95 Cherokee 190K DELO 10W30,XG8
07 IS250 97K FB ?w??,FULL
04 YZF-R1 19K DELO 15w40,XG7317
99 HD XL1200S 18K VR1 20w50,1515
14 RX450h 30k PP 0w20,NAPAG

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#4468654 - 07/24/17 07:18 AM Re: Oil for 2002 Jeep Grand Cherokee v8 [Re: justn]
Chris142 Offline


Registered: 06/05/03
Posts: 16978
Loc: Deplorable in apple valley, ca
My wifes chevy drinks 5w30...it goes 5k on 10w30 without needing any added though.
_________________________
02 Wrangler durablend 10w40
87 F250 traveler 15w40
04 Tahoe super-s 10w30
Z400 castrol T 10w40
Can am maveric edge 5w40
57 case tractor 15w40

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#4468665 - 07/24/17 07:38 AM Re: Oil for 2002 Jeep Grand Cherokee v8 [Re: justn]
E150GT Offline


Registered: 03/11/12
Posts: 1162
Loc: San Antonio, TX
With that kind of consumption the cheapest oil at Walmart I could find.
_________________________
1984 Mercedes-Benz 300SD - 100k
1995 F150 XL 4.9 reg cab 5MT - 251k 5w30
2016 Mazda6 Touring 6MT - 56k 10w30
2006 Buick Lucerne CXL 3.8 30k ?w30

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#4468692 - 07/24/17 08:16 AM Re: Oil for 2002 Jeep Grand Cherokee v8 [Re: justn]
khittner Offline


Registered: 07/13/12
Posts: 328
Loc: Michigan
You're using a quart every 500 miles---my 2-stroke Vespa gets better oil mileage than that. If it's not leaking all over the place, your engine is burning it, and will need rebuild or replacement/retirement soon/yesterday. Pour the cheapest 10w-30 you can find into it, and start shopping for a reman. engine if you want to keep the car.

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#4468712 - 07/24/17 08:42 AM Re: Oil for 2002 Jeep Grand Cherokee v8 [Re: justn]
JeepWJ19 Offline


Registered: 09/09/15
Posts: 955
Loc: PENNSYLVANIA
Pennzoil HM 10w30 or PHM 10w40 for that 4.7
_________________________
2002 Jeep WJ 4.0 | Mobil 1 HM 5w30 |
TG8A | 2.5" lift | 148k miles

Software Engineer :]

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#4468722 - 07/24/17 08:50 AM Re: Oil for 2002 Jeep Grand Cherokee v8 [Re: justn]
bmwtechguy Offline


Registered: 06/15/04
Posts: 2682
Loc: South Carolina
Based on everything I have seen with oil burners and trying different viscosities and oils, you would be best served by first trying a 10W-30 HM blend like Maxlife or Castrol or even a full syn like M1 HM. If you continue to burn more than 1 quart every 1000 miles, then move one step up to 10W-40 HM of one of these oils and you should be able to go at least 2000 or more miles on each quart. With adding that much oil over the oil change, I would buy a 10,000 mile filter and just change it every 10k miles, esp if using M1 10W-40HM. Done it many many times.

For example, my sister is so relieved to not have to add nearly as much oil to her Chrysler minivan's 3.8 pushrod engine, which originally spec 5W-20. Somewhere along the way, they did not check the oil and let it get very low a few times, which most likely caused all the rings to gum/carbon up on the pistons and then as a result, the rings could no longer control the oil and compression as well. At first she tried ML 10W-30, a HM blend. It helped some, but not enough. Then she switched to M1 10W-30 HM, which helped even more. But she was still having to add oil way more than she wanted. Well, they are in Pensacola Florida, and I kept telling her to add 10W-40HM at least in summer, which she did. Now she uses it year round and goes 10k mile oil changes on 10k oil filter. Consumption now is totally acceptable at about 1 quart every 3-4000 miles. Yes, it's a bandaid, but works on an older vehicle to help effectively reduce all that oil burning.

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#4468723 - 07/24/17 08:51 AM Re: Oil for 2002 Jeep Grand Cherokee v8 [Re: justn]
bigt61 Offline


Registered: 02/12/13
Posts: 3117
Loc: Virginia
I'd try 10W-40 MaxLife Blend and use 20W-50 SuperTech as top off - that should slow it down.
_________________________
92 Suburban 2500 7.4L 58k M1_0w40 5yr OCI
99 Olds Aurora 4.0L 91K M1_5w30 5yr OCI
13 Dodge Dart 2.0L 30k PP 0w20 OLM OCI
70 Camaro 5.7L 59k

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#4468760 - 07/24/17 09:38 AM Re: Oil for 2002 Jeep Grand Cherokee v8 [Re: justn]
BrocLuno Offline


Registered: 09/06/15
Posts: 5625
Loc: Kalifornia Kollective
Another Cali here. I know what you are up against. So there are a few things to try, Replace the PCV system components that look bad. Hard hoses, obviously a new OEM PCV valve, grommets, etc. While you are in there looking at stuff, see how bad the oil film is where the PCV enters the breather system ...

Next get yourself a few cans of BG 109 (now known as EPR). Better if you could get KREEN, but can't be shipped into Cali, so the BG is next best. Full can every oil change. It will free stuck rings, etc. It takes time, no instant overnight cure here. But it'll get stuff free and working as it should.

Switch to Chevron Delo 400 15W-40. It may slow the consumption right off. But over time with the BG, it may bring the oil consumption down to manageable levels. It can take the heat no problem, and it'll still start easy in the snow.

I'd drop to 5,000 mile oil changes while doing the BG treatments. Say three of those for a total of 15,000 and then see where you are at ... If all OK, continue with Delo, if small leaks and weeps, switch the Maxlife blend 10W-40 and cruise on smile
_________________________
Formerly in marine engineering. In an earlier life I owned my own petroleum tank truck, and hauled for the majors and independent's.

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#4468816 - 07/24/17 10:26 AM Re: Oil for 2002 Jeep Grand Cherokee v8 [Re: justn]
merconvvv Offline


Registered: 07/10/16
Posts: 682
Loc: il usa
Try new pcv valve and air filter together with pennzoil platinum 10w30. If you are brave go pyb sae 30 atleast in summer if pp 10w30 does not fix the oil consumption.
_________________________
1988 Mazda RX7 na PP 10w30 Noack 4.7
1994 Chrysler Concorde 3.3
1999 Ford Expedition 4.6 QSUD 10W30 NOACK 5.0

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#4468910 - 07/24/17 12:44 PM Re: Oil for 2002 Jeep Grand Cherokee v8 [Re: justn]
jeepman3071 Offline


Registered: 04/15/10
Posts: 4316
Loc: Storrs, Connecticut
Wow that is a lot of oil burning for the 4.7L at that mileage. My dad's '99 Grand Cherokee 4.7L had 200k on it and only burned maybe 1/4 quart over 5,000 miles maybe less and he wasn't someone who really kept up on maintenance.

Does it leak a lot of oil or is it burning all of it? I would check the PCV valve and look for leaks. I would think with that kind of consumption you would see blue smoke from the tail pipe.
_________________________
2000 Jeep Cherokee 4.0L (180k) - Pennzoil 10w30, Napa Gold 1516, Magnefine trans filter
2009 BMW 328i (32k) - Castrol Edge Euro 0w40, MANN HU816X

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#4468913 - 07/24/17 12:49 PM Re: Oil for 2002 Jeep Grand Cherokee v8 [Re: justn]
bradtech Offline


Registered: 03/10/17
Posts: 83
Loc: OK, USA
give a name brand high mileage oil a try for a while. I've seen a lot of good stories regarding Castrol GTX High Mileage & Valvoline Maxlife on oil consumption. Mobil 1 HM/Pennzoil HM are good as well.
_________________________
17 Chevrolet Malibu 3k 5w30 AC Delco Full Syn
08 Hyundai Santa Fe 78k 5w20 GTX HM OEM Filter
93 Chevy S10 203k 10w30 GTX HM ACDELCO PF52E Filter

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#4468929 - 07/24/17 01:07 PM Re: Oil for 2002 Jeep Grand Cherokee v8 [Re: justn]
Blkstanger Offline


Registered: 08/13/11
Posts: 1975
Loc: Lakeside, CA
My 4.7 used a little oil when i first bought it. I went to 10w30 HM and changed the PCV. Those two thing slowed the oil usage way down.
_________________________
99 Jeep WJ 4.7 186,000 Maxlife 10w30, Fram Ultra.

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