Re: Mixing gas ok ?...Not so

Thread view:

Enable EMail Alerts

Start New Thread

Thread rating:

George Adams - 30 Oct 2007 12:40 GMT

TG wrote

> Not so, as cars get more miles on them some tend to build u

deposit

> whic
> can raise the compression ratio and make premium...or at leas

highe

> octan
> than regular... necessary for reliability and performance. Subaru'
> ar
> notorious for this. T
>
> "Frank Logullo" <frankDOTlogullo@dol.net> wrote in messag
> news:5%f%d.138$b_5.18773@newshog.newsread.com..
>
> "Michael" <upssuper@Xearthlink.net> wrote in messag
> news:Clf%d.16185$qf2.1135@newsread2.news.atl.earthlink.net..
> Gas here in GA is up to $2.25 for premium. Is mixing 50% 83 wit
> 50% 9
> o
> for a WRX
>
> Does WRX require premium? If not you are wasting your money
> Mixing in
> car that does not require premium is OK but premium gives nothin
> extr
> except cost
> Fran

Well, I have a 1998 Forester that just turned 216,000 miles on th
odometer, and I am still running 87 octane, as recommended in th
manual. I guess it takes longer than that for the "notorious carbo
buildup"

I would use whatever grade is specified in the manual. Saving a fe
pennies on gas at the expense of the engine is false economy
Conversely, using a higher octane than required is throwing mone
away

-

Reply to this Message

houndman@phonom.net - 30 Oct 2007 17:10 GMT

On 30 Oct, 09:40, george9...@aol-dot-com.no-spam.invalid (George
Adams) wrote:

> TG wrote:
> > Not so, as cars get more miles on them some tend to build up
[quoted text clipped - 34 lines]
> ---= Fast & Free Web Portal to Usenet Newsgroups =---
> -------------=http://www.ugroups.com/=-------------

I believe that any carbon buildup gets blown away on a long, high
speed ride. The kind that when you are finished the engine purrs.

VF

Reply to this Message

brian - 01 Nov 2007 13:27 GMT

On Oct 30, 9:10 am, hound...@phonom.net wrote:

> On 30 Oct, 09:40, george9...@aol-dot-com.no-spam.invalid (George
>
[quoted text clipped - 44 lines]
>
> - Show quoted text -

I believe the OP has a valid point in that many high-mileage vehicle
will burn more oil and build up carbon and cause higher compression
and subsequent engine knock.The knock sensor will retard the timing so
you don't notice this.What you may notice is lousy (er) gas
mileage.Switching to a higher grade may restore mileage but not cost
per mile. Solution would be to repair the motor,ie. replace valve
seals (and guides if necessary),re-ring etc.

Reply to this Message