He had to cut and paste all that theoretical crap.
Don't be impressed, boys.
"
Use any decent mineral oil, change it once in a while, and the filter, and all will be well.
Never buy expensive synthetic oils - the only good they do is to fill up the pockets of the people who sell the stuff.
I mean, read this bit of drivel ....
"If the oil is mineral based or synthetic it should still meet the manufacturer's requirements and as such cannot be used past the recommended oil drain interval."
"CANNOT BE USED PAST THE RECOMMENDED OIL DRAIN INTERVAL"
Really? Who says? If I want to run it ten times longer I will do just that, so don't let any smart arse snake oil vendor say I CANNOT do that.
That whole cut'npaste was Crapola from start to finish, but maybe the guy who did it is from Seneca Valley and sells snake oil himself for a living?
CharlesY
Go your own way charles, i have seen many cars come into our workshop who have skipped services and they do not sound or go as well as the cars that have not skipped services, fact. You have a few examples of extended drain intervals not doing any harm, i have hundreds of examples that is does do harm.