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Unread 04-11-2015, 09:33 AM   #1
303jeepkj
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Regular or synthetic?

Just got my 05 liberty in December and it has 97500 miles. I'm curious how many miles and what type of oil, regular or synthetic everyone is using.

Thanks!

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Unread 04-11-2015, 09:58 AM   #2
Tombo_ontario
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2002 KJ Liberty 
 
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I'm at 190000kms (118000miles)...Mobil 1 synthetic 5w-30
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Unread 04-11-2015, 02:28 PM   #3
kjsteve
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98800; Pennzoil 5w30 regular
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Unread 04-11-2015, 04:18 PM   #4
boboborino
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I am ~106000 KM(~69000 miles) on our '02 and have chose to go with 10-30 regular GTX for the summer. I will switch it out with 5-30 come fall.

Bert
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Unread 04-12-2015, 09:09 AM   #5
streetglideok
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Quote:
Originally Posted by boboborino View Post
I am ~106000 KM(~69000 miles) on our '02 and have chose to go with 10-30 regular GTX for the summer. I will switch it out with 5-30 come fall.

Bert
Why such a thick oil when its designed to run with 5w30? Cant tell me you all have heat in the summer up there, as I'll laugh Too thick of oil will damage oil pumps and the relief springs.
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Unread 04-12-2015, 09:10 AM   #6
streetglideok
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104k and have been running Mobil1 5w30 since I bought it with 44k on it. 4-5k miles between services.
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Unread 04-12-2015, 02:48 PM   #7
tommudd
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214,000 been running Mobil 1 synthetic since my first change at 500 miles , changed every 3-3500 miles
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Unread 04-12-2015, 05:28 PM   #8
boboborino
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Quote:
Originally Posted by streetglideok View Post
Why such a thick oil when its designed to run with 5w30? Cant tell me you all have heat in the summer up there, as I'll laugh Too thick of oil will damage oil pumps and the relief springs.
I am well above the operating temperature range for the 10 weight at this time of year. It's hard for me not to be sarcastic considering we recently just got electricity and running water to our igloo!

Bert
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Unread 04-12-2015, 05:47 PM   #9
billiebob
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10-30 has been an industry standard forever. I run 10-30 in the summer too. 5-30 winters if I plan going some where cold. Where I live our record low is -15C or +5F. 10-30 works fine all winter here. I do 2 oil changes a year... spring and fall.

Must be a Canadian thing. I used to work for a company called Igloo Building Supplies.
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Unread 04-12-2015, 06:03 PM   #10
tommudd
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Yes screw what the manufacturer recommends....................





By the way I run 5W30 what they recommend
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Unread 04-12-2015, 06:22 PM   #11
02blue
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Originally Posted by tommudd View Post
By the way I run 5W30 what they recommend

Me too. Full synthetic now and every 3-4k with a wix filter. The good stuff definitely helps my oil fill condensation issue.
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Unread 04-12-2015, 08:08 PM   #12
Cropduster23
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I acquired my Liberty at 139,000 miles. The previous owners had used Pennzoil 5w-30 from new until 90,000 miles. At 90,000 miles they switched to Pennzoil High Mileage 5w-30. I have kept using Pennzoil High Mileage 5w-30 since I took ownership (2 changes so far. 1 on day of purchase and 1 today) I change my oil every 3000-3200 miles and I use a Purolator Pure 1 (gold box) oil filter.
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Unread 04-12-2015, 09:17 PM   #13
303jeepkj
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Appreciate the responses. The one thing about oil is just about everyone has a different opinion. I went Mobil 1 5w30 synthetic and Mobil 1 filter.
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Unread 04-12-2015, 09:34 PM   #14
streetglideok
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Quote:
Originally Posted by billiebob View Post
10-30 has been an industry standard forever. I run 10-30 in the summer too. 5-30 winters if I plan going some where cold. Where I live our record low is -15C or +5F. 10-30 works fine all winter here. I do 2 oil changes a year... spring and fall.

Must be a Canadian thing. I used to work for a company called Igloo Building Supplies.
Dunno where you got your info, but you're pretty far off base. SAE single viscosity oils were the standard far longer than 10w30 was, and the industry moved right along to 5w30 and 5w20 after that. 5w30 has been the recommended year round oil for nearly all spark ignition engines for over 20 years, and the majority of them for 30 years. That's far longer than 10w30 ever reigned. If you want to use a substandard weight for your engine, I guess more power to you, considering 5w30 is the recommended oil from the guys who made what you drive, for anything below 38*C. Let me know the last time you guys saw heat up there, and I'll invite ya down to Oklahoma or Texas for a week in August. Seeing how I work on the things and get paid to fix what people screw up, I can tell you what happens to people who start thinking they are one up on the engineer. You get longer cold start starvation of critical components, and increased wear of them as a result and of the oil pump. You increase the likelihood of cavitation in the pump that wears them out faster as well. You put undo strain on the oil pressure relief, causing future oiling issues, even when warmed up. These things aren't sloppy fit like your old engines that ran SAE 30. Much, much tighter tolerances, and thicker oil means it moves much slower, even when its spiked to 60psi or more. Guess what the camshafts ride in? Yep, straight up aluminum, not a bearing like you see on an old chevy or Chrysler 318. Yes, the specs say you can run 10w30 to -18C, however that's for when you have to, not that you should. They don't want you to and for good reason. Just make sure you put that disclaimer when you want to stray away from what they want you to run. If you're feeling brave, go get yourself a 5.7L Hemi, and run that 10w30 all the time. I dare ya, I need a good laugh
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Unread 04-13-2015, 05:00 AM   #15
boboborino
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Quote:
Originally Posted by tommudd View Post
Yes screw what the manufacturer recommends....................





By the way I run 5W30 what they recommend
WTF are you talking about? They recommend either 5W30 OR 10W30. The 5W30 is "(Preferred)" only because of the idiots that don't change out to 5/30 for when it gets cold. I never said I run the 10/30 all year long! You guys are the funny ones!If anybody knows COLD it's us Canadians and our freindly American neighbours (with the "u") to the North in Alaska!


Bert
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