Best Engine Oil For A High Mileage Jeep
#31
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Join Date: Jun 2016
Location: Calhoun GA.
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Model: Cherokee
Okay, thanks for all of the advice. I stayed with 5W30 and started running B12 fuel system cleaner in Th' Beast. The 5W30 is a full synthetic. I have a friend that is an ASE certified mechanic. His advice is to use the brand plugs that the engine was designed around. He also said that newer engines need to run a 5W weight oil. He works on everything but Jeep is his specialty. And as far as oil/filter changes, I always do that. Just not sure how the previous owner cared for her. I am now facing a high idle problem after replacing the IAC sensor. Looking into the TPS as maybe the cause. I don't bother my mechanic friend because he has done so much for me in the past. Trying to make it on my own. So if anyone has any input into the high idle problem I would appreciate it. The IAC sensor fixed a lot of problems including acceleration power. Idle was low but now is too high. ??? Im sure there is an adjustment on the TPS. Thanks..... Vinny
#34
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Join Date: Mar 2016
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Year: 99
Model: Cherokee
Engine: 4.0
I would avoid fram oil filters they are junk materials..Mopar,motor craft (Fl-1A) if u want higher capacity ,or wix are better choices.Heres a pic to show the insides as u see the three i recommend are built with metal ends and better quality ,if u look at fram cheap materials,paper ends the paper always has a weird residue on it..
#35
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Year: 1998
Model: Cherokee
Engine: 4.0L
I have been using Mobil One High Mileage most of the year. In the Winter I have some regular Mobile One and Mobile One extended in storage. Once used up I'll probably go with High Mileage Mobil One year around.
I've thought about switching to another brand oil. There are other good brand oils out their but I'm not as familiar with them as Mobil One, that I have been using for more than a decade.
High mileage engine oils such as Mobile One is thicker and includes seal conditioners and other additives better suited for high mileage engines. (Mobil One High mileage has a higher zinc content than regular mobil one)
I found a good deal on a case of Mobil One filters and a case of Amsoil oil filters. So I'm using them as their designed more specifically for synthetic oils.
I try to change at around very ~4 to ~5 thousand miles or less when off-road, towing, etc.
I've thought about switching to another brand oil. There are other good brand oils out their but I'm not as familiar with them as Mobil One, that I have been using for more than a decade.
High mileage engine oils such as Mobile One is thicker and includes seal conditioners and other additives better suited for high mileage engines. (Mobil One High mileage has a higher zinc content than regular mobil one)
I found a good deal on a case of Mobil One filters and a case of Amsoil oil filters. So I'm using them as their designed more specifically for synthetic oils.
I try to change at around very ~4 to ~5 thousand miles or less when off-road, towing, etc.
Last edited by Anony; 08-08-2016 at 08:42 PM.
#36
CF Veteran
I started running rotella t5 10-30 in the 3 that are driven and after a few changes it stayed cleaner longer. Obviously cleaned some crap out. I have noticed though that the engine will get a little noisy around the change interval. Unfortunately they did start seeping more oil after also. They are an 01 with 195k, 98 with 214k and 98 with 163k. Ran castrol gtx high mileage in the wj when I had it and it seemed to make the lower end much noisier. Won't ever use that again. The one time I had the shop in town change my oil they put in 5-30. I think that may be spec. Definitely could hear a difference with that stuff. Oil is such an over debated topic I decided to try the rotella and am happy with it and it's fair priced. And if it's good enough for heavy equipment then it should be ok for a little 4.0.
#37
I have a 2001 Cherokee 4.0. I have put a lot of money and time into restoring her. An idiot mechanic or, so called mechanic almost ruined her. WHen I got it he had removed the thermostat and the engine skipped as if two of the cylinders were missing. Now she runs better but I need some advice of oil weights to use. I have a 5W30 in her now but I hear this is not the best for a high mileage vehicle. any advice would be helpful.
#39
CF Veteran
I didn't read through the whole thread, but you are gonna get a million different answers to this question. Also, I did catch the post about the fram oil filter. Don't, and I repeat, DO NOT use a fram oil filter.
EDIT: Just realized this is an old thread brought back from the dead. However, please don't use fram oil filters.
EDIT: Just realized this is an old thread brought back from the dead. However, please don't use fram oil filters.
Last edited by TFitzPat87; 11-16-2016 at 01:26 PM.
#40
I need info on my jeep for oil type please that I'm using.
I would like to know if I should use the new mobile 1 1 year annually 20,000 miles pertection for my 1999 jeep grand cherokee leredo 4x4 v8 4.7L. I want to use also the same oil for the oil filer models that would be the mobile 1 annually 20,000 miles pertection. Please let me know as soon as possible I need recommended likes. Ps it's is a ultra full synthetic but they only come in a 5w 30 and lower types please let me know soon thanks guys
Last edited by Jessie Rodriguez; 03-27-2017 at 07:17 AM.
#41
CF Veteran
I would like to know if I should use the new mobile 1 1 year annually 20,000 miles pertection for my 1999 jeep grand cherokee leredo 4x4 v8 4.7L. I want to use also the same oil for the oil filer models that would be the mobile 1 annually 20,000 miles pertection. Please let me know as soon as possible I need recommended likes. Ps it's is a ultra full synthetic but they only come in a 5w 30 and lower types please let me know soon thanks guys
Also, as far as I know, that stuff is new, so I don't think anyone has much experience with it. Just grab some Mobil 1 high mileage, or Rotella T6 5w-40, and a good filter (mobil 1, Wix, Mopar, etc.) and change your oil every 3 to 5k miles.
#43
CF Veteran
Regular oil and filter changes are the most important things you can do. Oil choice is a highly debatable subject.
A lot of us here are on the Rotella bandwagon. I run T6, but I'm "low miles" at 105k. Others like T5.
Since we've said Rotella over three times now, does Mr. Salad magically appear??
A lot of us here are on the Rotella bandwagon. I run T6, but I'm "low miles" at 105k. Others like T5.
Since we've said Rotella over three times now, does Mr. Salad magically appear??
#44
Newbie
I am using Pennzoil Platinum 10W-30 in my jeep, which can give an awesome result. This is the finest synthetic oil that can give you protection from friction. This engine oil keeps piston up to 45% cleaner and helps to protect the engine from loss of power. This one is the perfect oil for your Jeep.
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