PDA

View Full Version : A liitle advice please


JunzieB
02-26-2008, 10:24 AM
Ok so here's the story... I 've been working on my GF's Honda accord since Sunday night and all day Monday because i had the day off... Let's just say that i started my workday today with little sleep*sleep*
On my way to work i noticed I needed gas, so i stopped. Let's just saythat half a tank later i noticed that my dumbass was sleeping at the pumps and i was putting in 87 octane:eek:*shiner* ... Anyways i remembered having a conversation with a BMW service advisor once and they said that it's ok to just mix the fuel and it will bring the octane up higher so i put the rest in as 91... Now so far i haven't noticed any pinging or knocking but i was just wondering if and when this "pinging" does occur what exactly is the reason for it... i guess more or less i'm looking for a little education on the matter and why does this happen... Oh and in my defense once again my ass was sleeping at the pumps :D. I feel so bad putting that sh*t into my baby*mumble* feels like i did her wrong lol.

As always any advice is greatly appreciated. thanks guys!*th-up*

Mickey Knox
02-26-2008, 10:30 AM
i think M50 engines and later have a knock sensor which will retard the timing if knock is detected, so you might notice a slight loss of power, or you might not notice anything at all.

JunzieB
02-26-2008, 10:52 AM
Oops! sorry, i forgot to mention that my engine is a M52, it's a 1997 328i*angel*

HoldenC
02-26-2008, 10:58 AM
Your engine is fine. You could put 87 octane in for the rest of its life and the engine would still be fine. Mostly, Premium gas is a sales ploy. The only time you need to worry is if you have an M3 with high compression (i.e. e46 M3).

BimmerboyPH
02-26-2008, 12:23 PM
My mom once put 87 in our 2004 325i and there weren't any problems that we knew of.

ara325
02-26-2008, 12:27 PM
Your engine is fine. You could put 87 octane in for the rest of its life and the engine would still be fine. Mostly, Premium gas is a sales ploy. The only time you need to worry is if you have an M3 with high compression (i.e. e46 M3).


agreed...and if u have a chip that requires higher octane...usually 91+. Premium gas does make a difference so it's not all a ploy...it's probably not needed as much as gas companies like us to believe tho.

JunzieB
02-26-2008, 01:00 PM
Your engine is fine. You could put 87 octane in for the rest of its life and the engine would still be fine. Mostly, Premium gas is a sales ploy. The only time you need to worry is if you have an M3 with high compression (i.e. e46 M3).

agreed...and if u have a chip that requires higher octane...usually 91+. Premium gas does make a difference so it's not all a ploy...it's probably not needed as much as gas companies like us to believe tho.



So what's the big deal with BMW putting on the gas cap that you need 89 or 90 minimun?:huh?::confused:

summit425
02-26-2008, 01:12 PM
they just want to give you an image that BMW = premium car = using premium fuel

Even though I always put 91 octane.. I have no idea why I do that every single time..

just325iS
02-26-2008, 01:14 PM
You are fine, plus with this cold air your motor won't be knocking.

diezel06turk
02-26-2008, 02:19 PM
my uncle pumps 87 all the time he drives a 745i and calls me stupid for pumpin 91 to my 325

someguy
02-27-2008, 08:46 PM
most BMW engines (all e36s for sure) can detect knocking before you ever will and just retard the timing to accomodate.

M3ti Compact
02-27-2008, 10:03 PM
I can already feel a difference when I put in Sunoco 94 as compared to Shell 91 into the E90, for sure you will feel something with 87...who knows, it might be faster on 87 *shiner*!

propr'one
02-27-2008, 10:43 PM
A) you'll be fine

B) gas stations dont carry 89 gas. It doesn't exist. Its mixed 87/91 at the pump 50:50.


(87+91)/2 = 89

JunzieB
02-28-2008, 09:52 AM
Thanks for the advice guys, I really appreciate it.*th-up* So i don't need to really worry about that crap until i scoop my E46 M3:cool:.

Now to wikipedia i go to learn about octane ratings and how they affect high compression peerformance engines compared to regular engines, besides better fuel economy that is.:D