Originally Posted by
Rina120
So I used to have a 94 525i and i used 89 octane gas.
Eventually, the gas tank imploded, I'm not sure if this is related to the gas or not.
Anyhow, I got rid of that car and now I have a 93 525i. The previous owners put premium gas only in it. Since I have had it (July), I have used 89, like I usedin my previous one.
This past weekend, I actually took a peek at that note in my gas tank and it says PREMIUM GAS ONLY.
So what gives? How come 89 was good for my 94 but I need premium for my 93? I thought you only had to use premium if you chipped the car?
What do you guys say?