Quote:
Originally Posted by KMPrenger
Is less timing being pulled a placebo effect? Is a slightly smoother and stronger dyno result a placebo effect?
A fair amount of research has been done on this forum over the past few years, showing what I stated above.
My honest opinion is this: Yes running a higher octane can be beneficial, but are the results from doing so are probably not big enough to be real noticeable.
|
Quote:
Originally Posted by GretchenGotGrowl
The problem is, there is quite a bit of KR with the LLT on 87 octane. You get a bit more timing (and power) if you use higher octane. However, there are no timing tables, as you said above, so you don't have to do a fuse pull to get the benefit when switching back and forth. When you want the extra power for the track, just fill up with 93 the day before and engage in a little spirited driving. In between days at the track, just run 87 and save some money.
|
These two.
Is it beneficial?
Depends. There is less knock retard with 93 than with 87. Higher octane not only prevents knocking, it lowers KR from the PCM. If lowering KR is a requirement, then its beneficial. If you don't care, then no.
Is it required?
No. If you experience knocking, then get the car fixed.
Will I get more power?
Yes. How much, I dunno.
Will you notice?
Probably not. Just note KR is higher in higher revs.
Will I get better fuel economy from using high octane?
Yes. but there are bigger factors like your driving behavior that affect your mpg more than higher octane.
Will I get my money back from the mpg increase from using by using higher octane?
No.
Is using higher octane a waste of money?
Depends. For a daily driver that isn't driven hard, its a waste of money. If you take it to the track or really, really want all the power you can get stock, then go ahead.
Well, do you use higher octane?
Yes. I want to ensure I got all the passing power I can have on the highway. But I know I don't need to use 93.
If anyone disagrees with these points, reply.