How often should I change the Pennzoil Platinum synthetic oil I recently changed to in my vehicles?

The synthetic will not break down, but acids will still build due to combusion chamber gases in oil. I depends on the age of vehicle. I would only push 3-5K past the oil change interval of 5K. Always watch the oil level, new vehicles do consume oil in cumbustion process so oil levels will reduce naturally.How often should I change the Pennzoil Platinum synthetic oil I recently changed to in my vehicles?
You need to change the oil every 3 to 5k miles.The only thin that synthetic oil does is allow for better start up.It also depends on how you drive wheather or not you change the oil 3 to 5k.I use Havoline oil 30hd oil non synthetic and i have 165000 miles on my truck.So i dont believe that synthetic oil has much of an advantage over conventional oil.How often should I change the Pennzoil Platinum synthetic oil I recently changed to in my vehicles?
i also used sythetic and used my trucks DIC for my oil changes, I didn't get better milage or longer time b4 oil changes. I am back to my 3000 miles or 3 months and my dirty CHEAP castrol GTX. U should follow your vehicles change information.
3000 miles
same way you always did every 3 to 5000 miles