Shell 100 Ocatne

[chunkylover]

Before i bought the car i asked the guy what fuel it was tuned too, and he said Shell Optimax 98. So i try to fill up with shell all the time. I noticed when i fill up with 98ron fuel sometimes the pfc indicates it knocks. Last time i seen it knock was 195, i have seen it up to 200. So i decided to fill up with Shell Optimax Extreme 100. Since i filled up it hasnt knocked at all (About 12-15 knocks). Since Optimax Etreme is ethonol based for higher octane, for long term use would it be safe?

Cheers Anggi.

[s2k12]

dunno but 100ron isnt 100%. bp 110 - 115 octane is the best imho.

EDIT: corrected myself.

Edited August 29, 2006 by s2k12

[paulr33]

whilst using higher octane fuel will take out knocking you should just have your tune fixed to suit 98 ron fuel. the powerfc faq (in my sig) will help you identify the knocking show you how to report it to your tuner

[s2k12]

and yeah shouldnt drive a car thats pinging at all!

[Guest Mashrock]

Before i bought the car i asked the guy what fuel it was tuned too, and he said Shell Optimax 98. So i try to fill up with shell all the time. I noticed when i fill up with 98ron fuel sometimes the pfc indicates it knocks. Last time i seen it knock was 195, i have seen it up to 200. So i decided to fill up with Shell Optimax Extreme 100. Since i filled up it hasnt knocked at all (About 12-15 knocks). Since Optimax Etreme is ethonol based for higher octane, for long term use would it be safe?

Cheers Anggi.

i beleive the question your asking about ethonol fuel, is yes its safe. but also its only been around for a short time i figure in these applications correct??

but from what i've been told its ok to run as long as its tuned to it.

[chunkylover]

So whats normal knock numbers?

[paulr33]

read the faq, it covers this in depth. normal would be around 20

[JeeTeeEss25Tee]

Wow knock at 195? Isnt anything over 80 pretty bad already?

[paulr33]

60 is warning

[chunkylover]

Wow knock at 195? Isnt anything over 80 pretty bad already?

But its not all the time, happend twice over 100 knocks...

Edited August 29, 2006 by chunkylover

[assyrian4evaa]

wat do you guys mean by knock??

[KamikazeR33]

wat do you guys mean by knock??

[eMsta]

hahahaha...that is bloody funny

but i too would like to know what you all mean by knocks....

[KamikazeR33]

knock = pre ignition

[eMsta]

still makes no sense dude........

[RS500]

knock = pre ignition

also known as pinging (pinking by some)

[Color_Of_Green]

Also depends if you're hitting rev limiter in which case knock value on PFC will show large numbers.

[scathing]

still makes no sense dude........

Results 1 - 10 of about 6,030,000 for engine knock. (0.33 seconds)

If that makes no sense, it means it would have taken you just over a quarter of a second to get an answer if you'd gone and looked.

[s2k12]

lol, basically its a bad thing usually caused by engine under too much boost or stress. leads to detonation.

[AzzurrA]

dunno but 100ron isnt 100%. bp 110 - 115 octane is the best imho.

EDIT: corrected myself.

i would like to subscribe to receiving this 110 - 115 RON pump fuel?