Higher Octane????
Seasoned HDF Member
Joined: May 2008
Posts: 21,032
Likes: 12,559
From: South Carolina
That depends on the specific gravity of the fuel, not the octane.
On pump gas the advantage of higher octane is that it lights off at a higher temperature, which helps prevent detonation.
On pump gas the advantage of higher octane is that it lights off at a higher temperature, which helps prevent detonation.
Seasoned HDF Member
Joined: May 2008
Posts: 21,032
Likes: 12,559
From: South Carolina
Do you mean 93 octane, with ethanol?
When the gas pump had the big sign on it that said ETHYL, that was a good thing...
I`m almost 66, and that was before my time...
When the gas pump had the big sign on it that said ETHYL, that was a good thing...
I`m almost 66, and that was before my time...
Last edited by Dan89FLSTC; Aug 19, 2020 at 04:51 PM.
Tourer
Joined: Jan 2010
Posts: 296
Likes: 157
From: Heart of Dixie
Cruiser
Joined: Jul 2006
Posts: 149
Likes: 55
From: Bellevue, NE
100% high octane is becoming allot like Bigfoot, hard to spot.
Tourer
Joined: Jan 2010
Posts: 296
Likes: 157
From: Heart of Dixie
yup, I can't find 93 pure near me, damn nebraskan's love their corn. I do have a pump nearby that has 91 pure and I run that anytime possible. I try to avoid ethanol at all cost in the bike and try to stay 91 or higher. Back when I was racing, I kept a 55gal drum of VP motorsport 103 in the garage but that **** gets expensive fast.
Stellar HDF Member
Joined: May 2015
Posts: 2,091
Likes: 304
From: mid Michigan
I just got 2 gallons of race 110 went for short ride then got 2 gallons of 91 pure gas. After that it was running real good and the right pipe is looking clean. smells so good. Im running lean do to SE pipe with no tuner yet. still looks lean but no more specs. Also ajusted TPS and a bit of MM oil to go with the race gas. Going to try just the pure gas for a while but even that is $1.50 more than regular. Race gas is $7.19 here so won"t be getting alot of that but want to get a bit more before I get a tuner.
HD Forum Stories
The Best of Harley-Davidson for Lifelong Riders
8 Best Harley-Davidson Motorcycles Ever
Pouria Savadkouei
10 Worst Harley-Davidson Motorcycles Ever
Pouria Savadkouei
Killer Custom's Jail Break Is The Breakout That Refused to Blend In
Verdad Gallardo
Crazy Bunderbike Build Looks Amazing, But Is It Impossible to Ride?
Verdad Gallardo
Harley-Davidson Reveals Super Cool Cafe Racer Concept
Verdad Gallardo
Engraved Rebellion: Inside Bundnerbike's Glam Rock II
Verdad Gallardo
10 Motorcycles You Should Never Buy
Joe Kucinski
10 Things Harley-Davidson Needs to Fix in 2026
Verdad Gallardo
Southpaw Super Glide: A Left-Hand-Drive 1979 Harley FXE Built to Fit the Rider
Verdad Gallardo
Thread
Thread Starter
Forum
Replies
Last Post
Bouffi
Softail Models
4
Jul 14, 2017 06:39 AM
Redlegvzv
General Harley Davidson Chat
27
Nov 24, 2015 05:49 AM