I realize this topic has probably been brought up before, but I could not find it exactly for my car. The car is a 2004 Honda Civic EX with the VTEC engine, 48,200 miles. It has seen dino all of its life, with 3-5k OCIs. Lately I have used Castrol GTX 5W-20 and have had good results with it. However, I have decided to make the jump to synthetic because the car will be spending an extended duration up in Canada for use by sister, away from my control. So rather than turn it over to a quick lube I’ve decided to use Pennzoil Platinum 5W-20 with an extended OCI. I’ve heard this oil does pretty well in Hondas. So my only question is the OCI. Most likely it will return from up north with under 5000 miles on the oil. Would it be okay to do a full 10k OCI on this oil? I’m betting it’ll fine, because after all, Honda specs 10k OCI for dino. Car is mostly highway driven, but it may see some short trips up in Canada. I’m just checking before I go ahead. Thanks for your input.