I am honestly floored by how many on here, do less than 5k miles!!!!....especially with all the used oil analysis that clearly show one can go far beyond 5k, especially with synthetics. I am even more amazed at how many still do 3k OCI's.
For my two Toyota's that are still on warranty, I pour in Syntheitic (Use to use M1, but am now buying PP) and allow the owners manual 5k miles or 6 months. (Yeah, I know....I could even go further, but I am dealing with the documentation for warranty and the fact that most driving on those two vehicles is short hops, city driving.....) Honestly, when the warranty runs out on these two rigs, I am going to go with a extended drain oil and try to get 10k miles.
For my son's Wrangler, it is a changed every 3 months and we pour in a dino that is usually on a HUGE sale ($1.99 YB the last fill). This rig has 165k miles on it and just seems to 'trash' oil very quickly. Yes, it probably needs a complete overhaul....but I purchased it for $3k, have had it for 3 years and will simply let my son's use it for a "kids car" until they graduate from high school and buy their own vehicles.