To the OP...'R' in the various acronyms refers to 'RATING' and hope you understand
what that means
Also, 'recommended' or 'recommendation' on the various OEM's manuals has more
meaning to it than most asking your type of question understands
Say, take engine oil change intervals. Either specified mileage/time or by the
on-board computer.
Go past them on a regular basis and have an engine failure...."TRY" to get
warranty on that blown engine
You are 'free' to do whatever you want...until you do something to take something
away from another.
In the blown engine vs oil change interval...you would be taking money away
from the OEM and the OEM will NOT part with their money in that case
All of these 'decisions' are just risk management decisions...AKA Gambling...
That is your choice and 'right'...but if you should ever cause damage/harm to
someone else because of your decision...then there is a price to pay. Both
to society and that owner/person
I'm not policing...there is no metrics to do so on these freebie forums. Just
advice and many who don't like some of the advice...dismiss and/or reduce the
value of those advisors with a derogatory moniker