Re: Ran on 94 octane (from 87) now surge of momentary power at start then stutter

Jul 01, 2003 2 Replies

I know what you mean.



My Jetta flew on Premium fuel...it makes some sortof difference...


- Peter



I know all the stuff about high octane doing nothing.... but I swear I can
> feel something. Perhaps my car shouldn't be run on low octane fuel
> anymore... who knows. Seems odd that there is different start off
> performance when I changed gasolines tho.
> > > Hey
> > >
> > > 1991 Golf GL 1.8L gasoline engine (100 Hp)
> > >
> > > I filled up with some 94 Octane gas (because it was cheap... only 61.9 > cents
> > > per litre of 87 octane, 74.9 for 94octane.... regular gas was this much
> a
> > > few months ago). Anyhow, I took it for a blast down the highway for an > hour
> > > and a bit.... seemed to get great gas mileage for a change. Anyhow now > when
> > > I go to start up in first gear the car wants to jump the gun a > little.... it
> > > will start to take off, but then will start to stutter because I am not
> > > nearly giving it enough gas for what it wants to do (this is all still > while
> > > the clutch isn't even all the way out)..... Should I have just kept > putting
> > > crude old 87 Ocane in it, as per usual.... I like treating the car to 94
> > > Octane now and then to clean it out on the highway (its a city car... it
> > > gets carbonized). This phenomenon only happens when I want to start off
> > > quickly off the line, which I wanted to do twice, the other 2-3 starts
> > > since I left the offramp were just normal acceleration attempts.... > nothing
> > > out of the usual.
> > >
> >
> > By the sound of it, 94 octane is the next best thing to a shot of > > nitrous . . .
> >
> > One of the myths about hi-test is that it is somehow 'cleaner' than
> > regular. Hi-test is not going to magically un-carbon valves and clean
> > injectors any better than regular can. You might notice a slight
> > improvement in MPG (maybe 1-2), but nowhere near enough to justify 25%
> > higher cost. And I doubt that most folks' butt-dynos are sensitive
> > enough to detect a performance difference in most of the engines that
> > were designed for regular. Sorry.
> >
> > H2Only
> >
> > btw, one of my cars just passed emissions with old, regular grade gas
> > . . . I didn't do a thing to prepare it.
>
>

My Jetta ('90 Carat) tends to rumble ***a little*** when I floor it....me thinks that that is due to it being an automatic transmission...regardless, there is a noticeable difference on Premium fuel. I typically use Petro Canada fuel, as Esso fuel tends to have a very high water content, and the car runs poorly on Esso anyway...

- Peter

attempts....

I don't know if this is relevant, I have a V5 Golf. I have to use Shell Optimax (98 octane). I was advised to use this since I had a lot of knocking noise coming from the engine. This seems to cure things and does give slightly better consumption. I have been told by a friend that races here that the petrol in UK is really bad quality and so the higher octane fuel seems to be better for a larger engine.

Regards,

Babu.

===== Original Message from "Peter Cressman" at

01/07/2003 04:09

Update Distribution Tel: +44 (0)20 8993 1010 Fax: +44 (0)20 8993 1018 E-mail: snipped-for-privacy@updatedistribution.com

This e-mail and the information it contains are confidential and may be privileged. If you have received this e-mail in error please notify us immediately. You should not copy it for any purpose, or disclose its content to any other person.

Join the Discussion

Have something to add? Share your thoughts — no account required.

Didn't find your answer?

Ask the community — no account required