View Single Post
Old 05 Dec 2003, 01:02 am   #10 (permalink)
sf/gf
Guest
  • Posts: n/a
  • User Status:


Default Re: Premium fuel in the GX470 necessary?


<wideglide01diespammers@cox.net> wrote in message
news:rflvsvsul9klcrf91ohfb8tra90a2dnv3m@4ax.com...

>
>
> You *can* damage your engine by going with too *high* of an octane
> fuel for an engine that's not designed for it. Higher octane is to


>
>
> ************************************************** ********************
>


Please explain how using too high of an octane fuel can damage an engine.
Although it may not make sense from an economic viewpoint, the only
difference between low octane and higher octane is that higher octane burns
slower (which is why it pings and knocks less). Some say higher octane also
has higher detergent levels, but I have never been able to verify this.

For what it is worth, in my GS 300, it recommends premium for best
performance but does not rule out lower octane fuels. I have tried regular,
mid-grade and premium and can not tell any difference in performance. So, I
compromise and use mid-grade. Most modern engines have the ability to sense
knock/ping and will automatically retard the ignition timing to compensate
for the lower octane fuel, with maybe a slight degree of reduced
performance.
Steve


  Reply With Quote
 

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54