Ohhhh jooyyyyyy an internet oil thread…
Lol jk
It’s all how you drive it and where you drive it. If you have a short commute, and the oil temps never get hot enough, then no, very no. Not many oils can withstand that amount of abuse, in terms of acid buildup. If you’re in colder climate, it’s even more essential.
But if you have a “long” commute(20+ mins) then I wouldn’t be horribly worried about running 12-15k on a 20k rated oil. This is assuming you are using a quality filter which is also rated for the same interval or more.
That said, I’ve changed the way I’ve been doing oil changes for a year or so now is, utilizing a Fram Titanium filter and full syn 10w30 super tech from wallymart. I will run 3-4k miles and do an oil change only, leaving the fram installed, and at the next oil change(3-4k miles)change both. Super tech is some damn decent oil for the price(check out project farm on YouTube on it). I get a bulk box of 12qts for $40. I could easily get 5-6k out of the OCI if I didn’t have the blower and WMI(meth and oil are nasty together).
Just cause the jug of oil says one thing, doesn’t always mean it’s the rule of thumb.
But, most extended OCI oils do have better additive packs.