the title of the post pretty much says it but i was just wondering as your modding your car when is a good poit or at what point should i switch to a higher grade fuel or do i ever have to switch to higher grade fuel.

 

I think it has something to do with cr and your nternals but i wanna know so bump it..

 

Anytime your setup is prone to detonation such as with higher compression ratios or forced induction.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Sleeper Style &raquo;</TD></TR><TR><TD CLASS="quote">Anytime your setup is prone to detonation such as with higher compression ratios or forced induction.</TD></TR></TABLE>



you can run lower octane fuel but it is harder to tune and you will lose optimun performance

anything from 10:1 to 12.5:1 I would run premium fuel

 

So, generally the higher the comp. the higher octane needed?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by mike9571 &raquo;</TD></TR><TR><TD CLASS="quote">So, generally the higher the comp. the higher octane needed?
</TD></TR></TABLE>

yes unless your car has a forced induction system such as a turbo, supercharger, or nitrous

 

once i put on the fully built head i didnt hesitate to use 91+ only.

 

so i should start using 91 once i put on my vtec head and cams or could i still run 87 safely.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by endorfinch &raquo;</TD></TR><TR><TD CLASS="quote">so i should start using 91 once i put on my vtec head and cams or could i still run 87 safely.</TD></TR></TABLE>

91 octane

 

yes it i highy recommend it. esp if your running vtec. 91 is the highest in san diego . but i know in other places you can get higher.

 

If you look at the GSR cluster it says "Premium Unleaded Fuel Only" so that is what you should use.

 

i used 91 octane all the time when i had my turbo daytona shelby, plus octane boosters

 

what kind of octane boosters do you use?

 

i use plus....any car my family owns has always used a high grade...i think its just better and cleaner, so why not, but gas prices suck! ...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by integra racr04 &raquo;</TD></TR><TR><TD CLASS="quote">i use plus....any car my family owns has always used a high grade...i think its just better and cleaner, so why not, but gas prices suck! ... </TD></TR></TABLE>



Use regular for an LS. You will get better mileage and your car will be faster. Premium fuel is not necessary for an LS.