william said:what is the # means when i go to the gas station,, 87, 89, 91, 93??
is that the year or octane #??
My 1995 Maxima was put to death (totaled) at 190,xxx miles. The engine had never seen anything other than Premium and the knock sensor was original.Eric L. said:However, a caveat to that is that there is a trend of knock sensor failures with the Maxima (95-99) at around the 75,000 mile mark. It does not trip the CEL and is a pain to replace. I believe however, that knock sensor failure was completely unrelated to the type of fuel used.
The knock sensor will not trip a check engine light. You probably had some other sensor go bad, like an O2 sensor. That is very common. The ECU has a mapped default in case any sensor goes bad, sort of a "failsafe" mode.Snopes said:Just to clear things up, the 2003 Murano manual says:
"Use unleaded regular gasoline with an octane rating of at least 87 AKI (Anti-Knock Index) number (Research octane number 91).
For improved vehicle performance NISSAN recommends the use of unleaded premium gasoline with an octane rating of at least 91 AKI number (Research octane number 96)."
Talk about a bunch of double-speak, as if NISSAN recommends 91 and someone else says you can use 87.
My 96 Maxima knocked with 87 octane after about 70K miles ( I guess the knock sensor failed...so what). After that, a tank of regular caused the CEL to come on. A tank of 93 would cause it to go off. I frequently ran 2 tanks of regular to one tank of premium. I never paid attention to the CEL, ever, and at 170K the engine purred like a kitten and broke 120 mph with ease.