Can I switch to synthetic at 136k miles?

ahjjones · **Joined:** Thu Aug 12, 2010 12:26 pm **Posts:** 38

Hey,
I'm wanting to switch to synthetic but I had 136k miles on my libby. Is it too late?

BugginKJ · **Joined:** Mon Jul 06, 2009 7:35 pm **Posts:** 4576

Just my

, the only synthetic I would use would be AMSOIL but I would do the engine flush first. Your engine will benefit from running synthetic.

JJsTJ · **Posted:** Sun Jan 16, 2011 12:14 pm

BugginKJ wrote:

Just my

, the only synthetic I would use would be AMSOIL but I would do the engine flush first. Your engine will benefit from running synthetic.

agree w/ above. Yes you can switch. I changed both my 94 XJ w/ 136K+ on it and 99 TJ w/ 130K+ on it over to syn. Many say that it can cause leaks to show up as the better additives in some syns start to remove deposits that are holding leaks back but my experience on the TJ is that a RMS leak got better after a couple months w/ syn, i believe that the better additives helped the seals. :2cents:

tommudd · **Posted:** Sun Jan 16, 2011 12:31 pm

I have switched several over with no ill effects at all. Some of the older engines it seemed would develop leaks but then it was engines that were 20 years old as well

long_tall_texan · **Posted:** Sun Jan 16, 2011 2:05 pm

I have swapped to synthetic on several vehicles long after the 100k mile mark. Never had any problems from it.

LibertyGuy · **Posted:** Sun Jan 16, 2011 7:04 pm

I just recently switched on my last oil change 80K miles, and have no issues.

ahjjones · **Joined:** Thu Aug 12, 2010 12:26 pm **Posts:** 38

Thanks everyone! I'm going to make the switch next month.
:JEEPIN:

Can I switch to synthetic at 136k miles?

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