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#4436976 - 06/20/17 06:03 PM Should I switch to 10w-30?
EOD89D Offline


Registered: 06/19/17
Posts: 4
Loc: Florida
My engine is burning oil after 200k miles. See number 6 for details. Also my father seems to think I should switch to 10w-30 and use lucus oil stabilizer. First off if my owners manual says 5w-20 (I currently use pennzoil high milage 5w-20) is it safe to use 10w-30? Also is that lucas stabilizer even necessary? Thank you. Below are my vehicle details.

1. What kind of vehicle you have-2009 jeep grand cherokee 3.7L 4x4
2. What your owner’s manual says - says to use SAE 5w-20 API certified engine oil
3. Where you live- northwest florida
4. How you drive (easy? hard? fast? slow?)easy and slow. Only drive fast when making a u turn through highway emergency vehicle median haha.
5. What your daily drive is like (short trips? long trips? city? highway?)first 0-60k miles I have no idea(I try not to buy new vehicles). from 60-160k miles it was mostly all highway miles. From 160k-205k miles it was even city/highway.
6. Whether your car has any known problems (leaks, oil consumption etc)- at around 200k miles started to use/burn/consume/magic alot of oil. Basically it would read at the top of the safe line on dip stick after an oil change and 2 months after oil would only show up at the tip of the dip stick...nowhere near the safe line (I can kick myself). Also I have funny noise humming noise comming from ujoint or front differential. Pretty sure it's ujoint.

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#4436978 - 06/20/17 06:06 PM Re: Should I switch to 10w-30? [Re: EOD89D]
bullwinkle Offline


Registered: 10/09/04
Posts: 7649
Loc: Cincinnati, OH, USA
Use HM 5W20, 5W30, or 10W30 (Maxlife is a good one),try a new PCV valve, check your front axle gear oil & see if it is low or burnt, might want to check wheel bearings too.
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#4436987 - 06/20/17 06:16 PM Re: Should I switch to 10w-30? [Re: EOD89D]
WillsYoda Offline


Registered: 10/17/15
Posts: 471
Loc: MN
Maxlife 10w30

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#4436989 - 06/20/17 06:19 PM Re: Should I switch to 10w-30? [Re: EOD89D]
zeng Offline


Registered: 09/01/15
Posts: 2183
Loc: Malaysia
It's safe to up the grade to 10W30/xW40.

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#4436991 - 06/20/17 06:21 PM Re: Should I switch to 10w-30? [Re: EOD89D]
EOD89D Offline


Registered: 06/19/17
Posts: 4
Loc: Florida
Thanks bull winkle.Replaced pcv valve recently. I ripped the hose to shreds getting it off so I put a different hose on there with a slightly sharper bend. Still seemed to be big enough in diameter to not effect gas flow. Could that be a problem? Also as far as the funny humming noise I know for a fact it's not wheel bearings. I recently replaced the front diff Fluid too and filled it. But I will check again. Took it to 4 mechanics and 2 said it's differential and 2 said it's u-joint/ drive shaft. It humms loud only when I touch the accelerator at 43mph-50mph and 60-73mph and immediately stops if I let off the accelerator. Thanks again bull winkle

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#4436993 - 06/20/17 06:24 PM Re: Should I switch to 10w-30? [Re: EOD89D]
EOD89D Offline


Registered: 06/19/17
Posts: 4
Loc: Florida
Thanks wills and zeng. I will upgrade then eek

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#4437083 - 06/20/17 08:31 PM Re: Should I switch to 10w-30? [Re: EOD89D]
NStuart Offline


Registered: 12/28/16
Posts: 278
Loc: Sav ga
Remove front dshaft and road test
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#4437093 - 06/20/17 08:39 PM Re: Should I switch to 10w-30? [Re: EOD89D]
FlyNavyP3 Offline


Registered: 07/04/16
Posts: 1407
Loc: Jacksonville, FL
Skip the Lucas addative for sure. No harm in trying a 10w30, my personal choice would be Valvoline MaxLife. Drivetrain hum that subsidies with throttle position is more likely the rear differential unless its full time 4wd which I dont think yours is.


Edited by FlyNavyP3 (06/20/17 08:54 PM)
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P-3C and P-8A Maritime Weapons and Tactics Instructor, Instructor Tactical Coordinator and Mission Commander

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#4437122 - 06/20/17 09:19 PM Re: Should I switch to 10w-30? [Re: EOD89D]
Alex_V Offline


Registered: 04/10/16
Posts: 1155
Loc: Campbellsville, KY
Another vote that 10w30 without any of that thick junk added in is fine.
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#4437185 - 06/20/17 10:25 PM Re: Should I switch to 10w-30? [Re: EOD89D]
Rolla07 Offline


Registered: 11/05/11
Posts: 4732
Loc: MTL, CANADA
How much oil brings it from tip of dipstick to full line? Would be good if you knew how much. If its 2 quarts per 10k mile OCI it isnt that bad. Im sure you can go to 10w30 HM and see if it helps. I wouldnt touch Lucas unless even the thickest oil doesnt slow the leak. I would switch to conventional HM and go thicker. Will at least be cheaper to top up.
_________________________
2007 Corolla Red Pearl 155k miles
PP 0w20 & ST 4967


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#4437250 - 06/21/17 04:01 AM Re: Should I switch to 10w-30? [Re: EOD89D]
SR5 Offline


Registered: 07/07/15
Posts: 4456
Loc: Down Under
Yes: 10w30 HM
No: lucus oil stabilizer
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Penrite Vantage 10W40 SN & A3/B4 + Wesfil-Cooper Z154

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#4437374 - 06/21/17 08:26 AM Re: Should I switch to 10w-30? [Re: NStuart]
jeepman3071 Offline


Registered: 04/15/10
Posts: 4204
Loc: Storrs, Connecticut
Originally Posted By: NStuart
Remove front dshaft and road test


+1

Remove front driveshaft (should be only a few bolts) and test drive to see if the noise remains. If it does, likely a wheel bearing. If noise is gone, replace the u-joint.

10w30 high mileage should be fine in that engine, don't use Lucas it does nothing but make the oil thicker.
_________________________
2000 Jeep Cherokee 4.0L (179k) - Pennzoil 10w30, Napa Gold 1516, Magnefine trans filter
2009 BMW 328i (32k) - Castrol Edge Euro 0w40, MANN HU816X

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#4437885 - 06/21/17 06:48 PM Re: Should I switch to 10w-30? [Re: EOD89D]
EOD89D Offline


Registered: 06/19/17
Posts: 4
Loc: Florida
Thank you all for the advice. I'm actually going to try the remove front drive shaft suggestion. And I will be switching to 10w-30. Thank you all.

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