synthetic and now leaks
#1
Junior Member
Thread Starter
Join Date: Dec 2008
Posts: 39
Likes: 0
Received 0 Likes
on
0 Posts
Year: 2001
Model: Cherokee
Engine: 4.0
synthetic and now leaks
well i switched to synthetic mobil one 5w-30 on christmas day and no i am leaking oil i am down a quart and it is leaking from the filter and top of my oil pan. should i switch back to dino oil.
#5
CF Veteran
Join Date: Apr 2008
Location: Smiths Station, Al
Posts: 7,661
Likes: 0
Received 13 Likes
on
10 Posts
Year: 87
Model: Wagoneer
Engine: 4.0 I6
Nope you have created them now you have to fix them. If you want to run synthetic then keep running it but you will have to deal with the problems like leaks that can occur when switching oils. Soon your engine and seal will get used to the new oil and it will be fine again.
Trending Topics
#8
Seasoned Member
Join Date: Aug 2007
Location: Illinois
Posts: 399
Likes: 0
Received 4 Likes
on
2 Posts
Year: 2000
Model: Cherokee
Engine: 4.0
Cool, I'm not trying to make you change your oil type by any means. I was just wondering. everybody has their own preferences when it comes to oil viscosity/brand and so on. Just make sure the oil you use has the additive "ZDDP" it helps form a protective film on the cam and lifters IDEAL for flat tappet cams IE: older style push rod type engines. Most new oils don't use "ZDDP" because the Gov. decided that ZDDP was one of the causes of cat converters failing sooner than they should. Thus new oil must not have any ZDDP added. Of course you can always by a ZDDP oil additive, or use "high mileage" oil.
#9
CF Veteran
Join Date: Apr 2008
Location: Northern Illinois
Posts: 2,237
Likes: 0
Received 3 Likes
on
3 Posts
Year: 90
Model: Cherokee
Engine: 4.0
Nope you have created them now you have to fix them. If you want to run synthetic then keep running it but you will have to deal with the problems like leaks that can occur when switching oils. Soon your engine and seal will get used to the new oil and it will be fine again.
What happens is that the dino oils leave behind crud,gunk,mung and it builds-up. Seals that are worn let a tiny bit of this stuff to build-up in the leak and it closes off.
Synthetics contain a MUCH higher percentage of detergents than dinos. So these detergents clean out the crap left behind by the dino oil and the leaks appear.
So the OP didn't create the leaks, neither did synthetic oils. Just plain wear created the leaks. The OP simply cleaned the crud out that kept the leak from being seen. The chances are good that the seal was actually seeping a bit. But now he needs to fix the leaks, they won't go away.
When you are looking for the correct oil for a 4.0l, you are looking for oils that meet the API-SL rating. This rating still contains enough Zinc and Phosphorus for the 4.0L. ZDDP is simply the compound that contains the Zinc and Phosphorus.
Last edited by whowey; 01-04-2009 at 01:16 PM.
#10
CF Veteran
Join Date: Mar 2008
Location: South Side Chicago
Posts: 2,088
Likes: 0
Received 2 Likes
on
2 Posts
Year: 1992, 2- 1998 (All 3, 4 Doors)
Model: Cherokee
Engine: 4.0L in all
Actually, the difference between 5w-30 & 10w-30 is negligible, and the diff. between 10w-30 & 10w-40 are negligible at freezing. Just a lil FYI...
Thread
Thread Starter
Forum
Replies
Last Post
cpnwrench
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
13
02-15-2024 08:09 AM
mattsmako
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
5
10-01-2015 10:01 AM
carbuff
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
6
09-30-2015 11:24 PM
dshirk
Stock Grand Cherokee Tech. All ZJ/WJ/WK Non-modified/stock questions go here!
0
09-24-2015 10:17 PM
Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)