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First off, turbochargers limit boost to a certain PSI above ambient so less=
absolute pressure at higher altitudes.=C2=A0 Also, modern cars all have kn=
ock sensors which accommodates lower octane fuels by retarding ignition tim=
ing.=C2=A0 Hence no need for higher octane at higher altitudes.
Dave
On Monday, September 21, 2026 at 08:34:36 AM CDT, Philip Ethier <pethier7@g=
mail.com> wrote:
On Mon, Sep 21, 2026 at 7:43=E2=80=AFAM Jim Franklin <jamesf@groupwbench.or=
g> wrote:
You won=E2=80=99t find it in higher elevations because the effective compre=
ssion is lower in the thinner atmosphere. Surprised you don=E2=80=99t see a=
ny on the flats before the hills though.
What about all the turbocharged cars in mountain=C2=A0areas?=C2=A0=C2=A0
Jim
On Sep 21, 2026, at 07:43, Philip Ethier <pethier7@gmail.com> wrote:
=EF=BB=BFLooking for=C2=A093 Octane Gasoline for a trip out to Salt Lake Ci=
ty=C2=A0and not finding online any record of 93 Octane gasoline along the w=
ay.
_______________________________________________
Shop-talk@autox.team.net
Archive: http://www.team.net/pipermail/shop-talk http://autox.team.net/arch=
ive
ssey@cs.com
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<div style=3D"font-family: Matter, Helvetica Neue, Segoe UI, Helvetica, Ari=
al, sans-serif; font-size: 12pt"><span style=3D"font-family: Matter, Helvet=
ica Neue, Segoe UI, Helvetica, Arial, sans-serif;"><span style=3D"font-size=
: 12pt;">First off, turbochargers limit boost to a certain PSI above ambien=
t so less absolute pressure at higher altitudes. Also, modern cars al=
l have knock sensors which accommodates lower octane fuels by retarding ign=
ition timing. Hence no need for higher octane at higher altitudes.</s=
pan></span></div><div style=3D"font-family: Matter, Helvetica Neue, Segoe U=
I, Helvetica, Arial, sans-serif; font-size: 12pt"><br></div><div data-signa=
ture=3D"true" class=3D"signature"><div><span style=3D"font-size: large;">Da=
ve</span></div><div><br></div><div><br></div></div><div style=3D"font-famil=
y: Matter, Helvetica Neue, Segoe UI, Helvetica, Arial, sans-serif; font-siz=
e: 12pt"><br></div><div style=3D"font-family: Matter, Helvetica Neue, Segoe=
UI, Helvetica, Arial, sans-serif; font-size: 12pt"><br></div><div><span st=
yle=3D"font-size:13px; color:#26282a;">On Monday, September 21, 2026 at 08:=
34:36 AM CDT, Philip Ethier <pethier7@gmail.com> wrote:</span></div><=
blockquote style=3D"border-left: 1px solid #ccc; padding-left: 8px; margin:=
8px 0 0 8px;"><div><br></div><div id=3D"yiv0079889449"><div dir=3D"ltr"><d=
iv dir=3D"ltr"><div style=3D"font-family:monospace;" class=3D"yiv0079889449=
gmail_default"><br></div></div><br><div class=3D"yiv0079889449gmail_quote y=
iv0079889449gmail_quote_container"><div dir=3D"ltr" class=3D"yiv0079889449g=
mail_attr">On Mon, Sep 21, 2026 at 7:43=E2=80=AFAM Jim Franklin <<a rel=
=3D"nofollow noopener noreferrer" target=3D"_blank" href=3D"mailto:jamesf@g=
roupwbench.org">jamesf@groupwbench.org</a>> wrote:<br></div><blockquote =
style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);pa=
dding-left:1ex;" class=3D"yiv0079889449gmail_quote"><div><div dir=3D"ltr"><=
/div><div dir=3D"ltr">You won=E2=80=99t find it in higher elevations becaus=
e the effective compression is lower in the thinner atmosphere. Surprised y=
ou don=E2=80=99t see any on the flats before the hills though.</div></div><=
/blockquote><div><br></div><div style=3D"font-family:monospace;" class=3D"y=
iv0079889449gmail_default"><br></div><div style=3D"font-family:monospace;" =
class=3D"yiv0079889449gmail_default">What about all the turbocharged cars i=
n mountain areas? </div><div style=3D"font-family:monospace=
;" class=3D"yiv0079889449gmail_default"><br></div><div style=3D"font-family=
:monospace;" class=3D"yiv0079889449gmail_default"><br></div><blockquote sty=
le=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);paddi=
ng-left:1ex;" class=3D"yiv0079889449gmail_quote"><div><div dir=3D"ltr">Jim<=
/div><div dir=3D"ltr"><br><blockquote type=3D"cite">On Sep 21, 2026, at 07:=
43, Philip Ethier <<a rel=3D"nofollow noopener noreferrer" target=3D"_bl=
ank" href=3D"mailto:pethier7@gmail.com";>pethier7@gmail.com</a>> wrote:<b=
r><br></blockquote></div><blockquote type=3D"cite"><div dir=3D"ltr">=EF=BB=
=BF<div dir=3D"ltr"><div><span style=3D"color:rgb(53,60,65);font-family:Int=
er, -apple-system, Roboto, Helvetica, Arial, sans-serif, Color UI UI;font-s=
ize:14px;">Looking for 93 Octane Gasoline for a trip out to Salt Lake =
City<span style=3D"font-family:monospace;" class=3D"yiv0079889449gmail_defa=
ult"></span> and not finding online any record of 93 Octane gasoline a=
long the way.</span></div><div><span style=3D"color:rgb(53,60,65);font-fami=
ly:Inter, -apple-system, Roboto, Helvetica, Arial, sans-serif, Color UI UI;=
font-size:14px;"><br></span></div><div><span style=3D"color:rgb(53,60,65);f=
ont-family:Inter, -apple-system, Roboto, Helvetica, Arial, sans-serif, Colo=
r UI UI;font-size:14px;"><br></span></div><div><span style=3D"color:rgb(53,=
60,65);font-family:Inter, -apple-system, Roboto, Helvetica, Arial, sans-ser=
if, Color UI UI;font-size:14px;"><br></span></div><div><br></div><div><br><=
/div></div></div></blockquote></div></blockquote></div><div dir=3D"ltr" cla=
ss=3D"yiv0079889449gmail_signature"><div dir=3D"ltr"><div dir=3D"ltr"><div =
dir=3D"ltr"><div dir=3D"ltr"><div><span style=3D"background-color:rgb(255,2=
55,255);"><a rel=3D"nofollow noopener noreferrer" target=3D"_blank" href=3D=
"http://www.mnautox.com/"; style=3D"color:rgb(0,24,57);font-family:verdana, =
geneva, lucida, arial, helvetica, sans-serif;"><br></a></span><br></div></d=
iv></div></div></div></div></div>
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Archive: http://www.team.net/pipermail/shop-talk http://autox.team.net/archive
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