I remember Mobil-1 advertising 25,000 mile OCI. Also remember M-1 heated in frying pan and regular oil burning up.
Back in the late 70’s or early 80’s,
I answered to a Chemical Engineer. Firmly believed in Mobil-1. Changed oil every spring, no matter how many miles he went. He did change oil filtet every 8,000 miles though Never had a problem.
Interesting note.
Chemical Engineers and Chemists do not get along. Each thinks there is no need for the other.
Back in the late 70’s or early 80’s,
I answered to a Chemical Engineer. Firmly believed in Mobil-1. Changed oil every spring, no matter how many miles he went. He did change oil filtet every 8,000 miles though Never had a problem.
Interesting note.
Chemical Engineers and Chemists do not get along. Each thinks there is no need for the other.