Hi all,
I've a 2009 Highlander LTD V6 with 100,000 miles, Mobil Super 5w30 is the only oil I've used over the last 60,000 miles without any issue. OCI: 4-5k miles.
I want to go with a longer OCI and I'm considering switch to M1 EP 5W30. if anyone of you use M1EP, do you extend the OCI all the...