this oil thing is very interesting people make claims of 100,000 miles using mobil one.allgood quality oils do the same thing.dont be fooled by marketing hype.regular oil , oil filter and air filter[use factory specs unless you live in dusty areas] changes between 3 and 6 thousand miles is all you need to do.my old honda civic had 240,000 miles on it did not burn any oil but was starting to have wear in other mechanical areas used whatever was on sale from mobil one to castrol to valvoline synthetic to non synthetic some times if i had oil left over from another manufacturer even a different weight would combine them with no problems,i would combine synthetic with non never had any problems.so either honda makes fantastic engines which is true partially and oil changes regularly is also true. or i was lucky....tried the purple oil once car did seem to run with more acceleration initially must have some sost of additive but worth the extra money is up to you, my four banger nissan truck has over 260,000 miles on it ran tuf oil additive almost all the time again a great engine or was it regular oil ect.. changes yeah and i drive them hard anyway i know the great oil debate will always exist i like to keep my cars for a long time at 100,000 a good engine design is just getting broken in. hopefully this mazda engine which is also a geat design will have the same life span