98 octane fuel

Alex Kurdian · Post by **Alex Kurdian** » Mon Jul 06, 2009 9:23 am

Hi all
Can someone please explain
If I have been using a 98 octane premium fuel (BP) since I bought my 02 neon
Is that going to be bad for my engine?
Should I have been using 91 octane regular unleadded?

Post by **occasional demons** » Mon Jul 06, 2009 9:38 am

Unless you have the eighth digit in the VIN as "F" you don't really need premium, It won't really hurt anything, but you may get better mileage from the standard fuel, as it burns faster. Thus more efficiently, in an engine with the timing curve designed for regular unleaded.

Adionik · Post by **Adionik** » Mon Jul 06, 2009 5:37 pm

You'd be fine putting 91 octane in there. I put 87 in mine.

03wingswestR/T · Post by **03wingswestR/T** » Mon Jul 06, 2009 6:23 pm

98????

Post by **occasional demons** » Mon Jul 06, 2009 6:37 pm

Different rating method overseas.....

03wingswestR/T · Post by **03wingswestR/T** » Mon Jul 06, 2009 6:40 pm

haha ok i was like wtf??

Post by **racer12306** » Mon Jul 06, 2009 8:45 pm

US = RON + MON/2

Australia = either RON or MON, can remember which. pretty sure RON.

UriahRR · Post by **UriahRR** » Mon Jul 06, 2009 11:19 pm

racer12306 wrote:US = RON + MON/2

Australia = either RON or MON, can remember which. pretty sure RON.

...

Every time you speak it's like another language

Nutmeg · Post by **Nutmeg** » Tue Jul 07, 2009 4:47 am

For 2.0Ls, don't bother with premium. I don't remember, but I think I even read somewhere that regular was better.

Post by **occasional demons** » Tue Jul 07, 2009 8:23 am

Unless you have the R/T or ACR PCM, it isn't really needed. With the R/T pcm, it isn't truely needed, it just helps achieve the full potential of the timing curve.

With the knock sensor unplugged, (not intentional) I had no audible spark knock with 93, but with 87 it sounded like a diesel. (R/T PCM) with it plugged back in it runs fine on either, but the timing/power output is adjusted accordingly.

Post by **racer12306** » Tue Jul 07, 2009 6:58 pm

UriahRR wrote:
racer12306 wrote:US = RON + MON/2

Australia = either RON or MON, can remember which. pretty sure RON.
... Every time you speak it's like another language

http://en.wikipedia.org/wiki/Octane_rating