Regular gas vs. High Test
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Tourer
Joined: Aug 2004
Posts: 453
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From: Glenwood, N.J.
Regular gas vs. High Test
Pulled a really dopey move yesterday...........rode into a gas station on my Harley Softail Deluxe to gas up and was not even thinking and filled up with reguler gas! Yikes, how will bike run on reguler gas after they tell you nothing but premium? Thanks.
hb
hb
"Moderator & Connoisseur of Ice Cream"
Joined: Apr 2005
Posts: 7,008
Likes: 5
From: Montgomery Al
RE: Regular gas vs. High Test
Well..........you picked the right time of the year to do it. One of the main reasons that MOCO wants you to run premium is the simple fact that the higher octane runs cooler, and HD's are in fact air cooled.
DOnt sweat it. Just fill er up again with the hi test next time.
Mikeeeeeeeeeeeeeee
DOnt sweat it. Just fill er up again with the hi test next time.
Mikeeeeeeeeeeeeeee
Outstanding HDF Member
Joined: Jun 2005
Posts: 2,172
Likes: 7
From: Clermont, GA, CSA
RE: Regular gas vs. High Test
When gas went up I tried running regular in my '93 Sportster. It ran ok, but 'diesaled' when I shut it off. So I went back to premium. It took a little over a tank of premium before it stopped 'diesaling.'
Road Master
Joined: Oct 2005
Posts: 1,007
Likes: 1
From: Baghdad, Iraq
RE: Regular gas vs. High Test
Have run both in my bike, in-town and highway, various elevations, various temperatures, and the only difference I ever noticed was fuel economy. Better with the premium.
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Seasoned HDF Member
Joined: Jan 2005
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From:
RE: Regular gas vs. High Test
I wouldn't worry too much about it, just refiil with Premium and it should work itself out. Before long, you will be back to normal just like nothing had ever happened.
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Seasoned HDF Member
Joined: Dec 2004
Posts: 7,934
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From: Bloomfield, NM
RE: Regular gas vs. High Test
I have used regular on two occasions when I got caught low on gas and nothing else available. I just put in enough to get me to some premimum. Hasn't hurt anything that I can tell.
I don't make a habit of it, but I don't lose sleep over it either.
Regards,
Bill
I don't make a habit of it, but I don't lose sleep over it either.
Regards,
Bill
Stellar HDF Member
Joined: May 2005
Posts: 2,137
Likes: 17
From:
RE: Regular gas vs. High Test
Lower compression engines need a hotter fuel in order to burn the fuel mix efficiently. The lower the octane number the hotter the burn. Most TC and Evo engines are below 9 to 1 compression and shouldn't need more than 87 octane fuel, or 85 at higher elevations (because of less oxygen in the atmosphere even hotter burning fuel is needed). Why HD recommends premium for TCs I don't know.
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