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Old 09-22-2013, 12:24 PM   #151
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If you are changing synthetic at less than 10,000 miles you are wasting money, and not taking advantage of its main advantage. I buy Mobil 1 in 5 qt. bottles at Walmart for $25. Conventional oil is $16/5 qts. I change filters @ 5000 miles, oil and filter @ 10,000 miles. The synthetic works out cheaper if used the way it is meant to be used. Been doing this for years on multiple vehicles with no issues.


Even changing at 10,000 miles is conservative for synthetic. Lots of guys running 300,000 mile vehicles with 15,000 mile synthetic oil changes out there.
You are getting value from the oil but a good filter should last 10,000 miles too,. Especially a filter like a Mobil One filter, the gold colored Purolator filters and a several others. Filters do a better job if they have some use to them, a 5000 mile filter change is probably a waste. Lots of talk about it on the Bob is the oil guy site. But if you have a warranty it is a good idea to follow the owners manual for oil and filter changes.

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Old 09-22-2013, 01:36 PM   #152
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Originally Posted by jmr40 View Post
If you are changing synthetic at less than 10,000 miles you are wasting money, and not taking advantage of its main advantage. I buy Mobil 1 in 5 qt. bottles at Walmart for $25. Conventional oil is $16/5 qts. I change filters @ 5000 miles, oil and filter @ 10,000 miles. The synthetic works out cheaper if used the way it is meant to be used. Been doing this for years on multiple vehicles with no issues.


Even changing at 10,000 miles is conservative for synthetic. Lots of guys running 300,000 mile vehicles with 15,000 mile synthetic oil changes out there.

In changing oil most important is filter but not oil, oil could last longer but filter could get clogged causing bigger issues. So, no I wouldn't suggest to go beyond 5K on stock oil filter.

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Old 09-22-2013, 03:18 PM   #153
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Recently I was looking at oil for my first oil change, ' 14 JKU Rubicon. With a lifetime warranty, I thought it important to follow Jeep manual on oil. Was amazed to find that the 7.5 gallons of Castrol GTX I had on hand does note meet Chrysler specs (FORD yes, Chrysler no). Castrol Edge does, but not regular 5w20. Also could not find where basic Mobil 1 did either. I keep proof of oil change,use the correct viscosity and want there to be no question on warranty when a claim comes up.

Any way - all oil is not equal and it seems Mercedes....er, Fiat.....ER, Chrysler has some tight standards that many oil producers/refiners don't meet.
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Old 09-22-2013, 03:43 PM   #154
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Mobil oils not meeting Chrysler specs was because of some kind of legal mumbo jumbo in the certification between the two of them, not any shortcoming with the oil. That may have even been covered elsewhere in this thread.
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Old 09-22-2013, 05:53 PM   #155
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Mobil oils not meeting Chrysler specs was because of some kind of legal mumbo jumbo in the certification between the two of them, not any shortcoming with the oil. That may have even been covered elsewhere in this thread.
Oil should meet SAE specs not Chrysler specs, differences between brands of same oil (5w30 synthetic for example) are very minimal. Otherwise it would be much larger issues for oil makers. Engines working only on specific brand(s) of oil is non-sense, Chrysler will never admit this.
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Old 09-22-2013, 06:21 PM   #156
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Oil should meet SAE specs not Chrysler specs, differences between brands of same oil (5w30 synthetic for example) are very minimal. Otherwise it would be much larger issues for oil makers. Engines working only on specific brand(s) of oil is non-sense, Chrysler will never admit this.
I agree... Chrysler had a falling-out with Exxon/Mobil during the bankruptcy. Then all of a sudden Mobil 1 didn't meet Chrysler's spec after they struck a deal with Pennzoil to supply the fleet. My 2009 SRT8 came with Mobil 1 as the factory fill - the oil fill tube cap said fill with Mobil 1. My 2010 SRT8 came with Pennzoil Platinum as the factory fill - the oil fill tube cap said fill with Mobil 1.

Chrysler was so cheap and in dire straights, they wouldn't scrap the old Mobil 1 oil fill tube caps in inventory.

I think this was more about bad blood and lack of Chrysler's ability to pay the outstanding payables, than Exxon/Mobil not able to meet some lofty engineering spec.

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Old 09-23-2013, 08:52 AM   #157
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I agree... Chrysler had a falling-out with Exxon/Mobil during the bankruptcy. Then all of a sudden Mobil 1 didn't meet Chrysler's spec after they struck a deal with Pennzoil to supply the fleet. My 2009 SRT8 came with Mobil 1 as the factory fill - the oil fill tube cap said fill with Mobil 1. My 2010 SRT8 came with Pennzoil Platinum as the factory fill - the oil fill tube cap said fill with Mobil 1. Chrysler was so cheap and in dire straights, they wouldn't scrap the old Mobil 1 oil fill tube caps in inventory. I think this was more about bad blood and lack of Chrysler's ability to pay the outstanding payables, than Exxon/Mobil not able to meet some lofty engineering spec. .02
Ok - but I don't get it, is it Chrysler that is certifying the oil, like in their labs? I would have thought Chrysler just published the specs, and an Oil mfg could decide to meet them or not.
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Old 09-24-2013, 08:28 AM   #158
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Ok - but I don't get it, is it Chrysler that is certifying the oil, like in their labs? I would have thought Chrysler just published the specs, and an Oil mfg could decide to meet them or not.
That is the party line but it's more about money. Oil vendor pays - car manufacturer recommends. There's no reason for thinking people to pay any attention to it.
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Old 09-24-2013, 08:37 AM   #159
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That is the party line but it's more about money. Oil vendor pays - car manufacturer recommends. There's no reason for thinking people to pay any attention to it.
Thats like saying I don't have to use BP fuel even though my Ford's gas cap recommends it. Crazy talk!

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