Old man at the Benz dealership says he’s been driving the same car for a long time and usually only puts in 87 octane in sprinkled with 91 every few times. What problems could this cause? Do I have to put in 91?
Disclaimer: I’ve owned (paid off) the car for 6 years and do put in 91, but trying to cut costs.
93 is not available everywhere hence mfg recommendations say 91+
91 is mainly available in higher elevations since 93 is not needed, so that 93 youre putting in does absolutely nothing, youre just paying extra out of pocket
same goes for econo shit boxes that you think is a race car because you put a 4" fart pipe and a weak ass looking high rise spoiler. if it requires 87, putting in 91+ wont make a difference in the world