switching to synthetic

needacherokee · 07-23-2005, 12:14 PM

I bought my 98 5.2 about a month ago with 120k. It runs great and blah, blah, blah. I think I might start using mobil 1 10w30. What do you think about switching to a synthetic with high miles on the motor?

nashmd454 · 07-23-2005, 12:49 PM

well the first question people will ask is whether or not you have even the smallest of leaks anywhere. If you have a leak, it will intensify when you swap to synthetic. If you have no leaks what so ever...then with that many miles you still have a chance of springing one. I have pondered the same question too and I have 136k on mine.

ZJunk · 07-23-2005, 01:11 PM

my front and rear main seals have had some very minimal leaking around them for quite some time. i was concerned about switching to synthetic, but i finally did. i have not noticed any increased leaking due to the thinner oil. i have a 4.0 w/ 105k.

needacherokee · 07-23-2005, 02:31 PM

I have switched to synthetic on many of my older cars. Lots of Datsun/Nissan Z's and haven't really had any problems. I might have to do it

**walter_da_jpr** · 07-23-2005, 08:30 PM

I just switched my 99 4.0L to synthetic. Mobil 1 5-40 Truck + SUV. No problems, better mpg, and no leaks. I have put about 600 miles on it since it was put in at 79,000.

WALTER

**Phil Gerard** · 07-23-2005, 08:36 PM

I switched my abused by previous owner 95ZJ 4.0L with 72K to Mobil 1 and I'm now at 92K and not leaking anywhere!

Try it!
Phil

TJRubicon06 · 07-24-2005, 06:49 AM

I run moblie 1, i swithed when i bought my ZJ, it had 130 on the clock, its 150 now stil no leaks, i officaly cam to the conclusion that the 318 is indestrustible.

Gazoo · 07-24-2005, 07:59 AM

Quote:

Originally Posted by needacherokee

I bought my 98 5.2 about a month ago with 120k. It runs great and blah, blah, blah. I think I might start using mobil 1 10w30. What do you think about switching to a synthetic with high miles on the motor?

It may cause a cataclysmic, catastrophic, extinction level event!!!!!!

07-23-2005, 08:36 PM	#6
Phil Gerard Break it, Fix It! Join Date: Jan 2004 Location: NJ Posts: 2,549 Profile Gallery Classifieds My Jeeps	I switched my abused by previous owner 95ZJ 4.0L with 72K to Mobil 1 and I'm now at 92K and not leaking anywhere! Try it! Phil __________________ '95 ZJ Ltd. White 4.0L TW DC DS; ARB Bull Bar, F&R Air Lockers; Superior Axles; Warn Winch; 4.56 gears; ACOS, Addco F&R Sw Bar, JKS Discos, Rr Track Bar & Nerfs, 249>242 Swap, Stillen rotors+Kolak pads, 3 pc. Armor, RE 4.5 Kit + 2.5"BB, Adj. UCAs&LCAs, OME SS, Bilstein 5150s, 15x8 AR Diamond Backs, 33 Truxus MTs, K&N FIPK, RE 62mm TB, Perf. Distr. 4.0L Kit, Exhaust: 2.5" Kolak exhaust FM 70: Optima Yellow, Mean Grn Alt., PIAA 520s, 540s, Kevins Rack, & TB Conversion

07-23-2005, 01:11 PM	#3
ZJunk Registered User Join Date: Jan 2005 Location: Austin, TX Posts: 66 Profile Gallery Classifieds My Jeeps	my front and rear main seals have had some very minimal leaking around them for quite some time. i was concerned about switching to synthetic, but i finally did. i have not noticed any increased leaking due to the thinner oil. i have a 4.0 w/ 105k.

07-23-2005, 02:31 PM	#4
needacherokee Registered User Join Date: Jun 2005 Location: West Virginia Posts: 45 Profile Gallery Classifieds My Jeeps	I have switched to synthetic on many of my older cars. Lots of Datsun/Nissan Z's and haven't really had any problems. I might have to do it