Jeep Garage  - Jeep Forum banner

Motor break-in period-synthetic oil

4K views 10 replies 9 participants last post by  JDubya 
#1 ·
Well im almost to to 6k miles and i already did two oil changes with regular castrol oil. I was wondering when the break-in time for the motor is over because I want to switch over to castrol synthetic oil at the next oil change. Will it hurt to switch it over now? Thanks:)
 
#3 ·
I was told to change the oil normally at 3k miles with regular oil, then once the motor breaks-in then I can switch over to synthetic. I want to know what the break-in mileage is? 10k miles?
 
#5 ·
Ive decided, at my next oil change at (8k miles) I am going to switch over to Castrol Synthetic 5w20 , I will be making some long trips before hand and I believe that will finish the break-in of the motor.:)
 
#8 ·
On my custom built forged engine I ran it for 100 miles with break-in oil. Changed over to regular oil for the next 500. Then regular oil again for the next 3k then switched to AmsOil synthetic. Regular 3k intervals after that.

3,600 miles until I used synthetic.

Your fine to switch over now, no worries!
 
#9 · (Edited)
There are multiple high performance vehicles that come off of the assembly line full of Synthetic. The Corvette is one of those, & several European lines as well, I believe that BMW & Mercedes both use synthetic as a factory fill. engines are built with way different tolences than they were even 20 years ago & lubricant technology is changing nearly daily to stay on top of ever-changing manufacturer & environtmental, EPA, API, CAFE, ACEA, IL-SAC, etc specs.

switch it ASAP!
 
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Top