premium vs reg
premium vs reg
I was wondering how many big twin owners with stock motors have tried reg gas? My 09 110 road glide needs 92 or it spark knocks bad. Prior to that I had a 05 and 07 that both ran better (road glides) on regular. 46 to 49 mpg always on the 05 and 44 to 47 on the 07. both of these bikes got at least 2/3 mpg worse on 92 oct.
My toy a 01 fxd is a 103 11/1 comp (at least) with hemi heads and runs on 92 octane with no preignition. So I don't see why almost everyone is putting premium in stock 8 1/2 to 1 comp motors.
My toy a 01 fxd is a 103 11/1 comp (at least) with hemi heads and runs on 92 octane with no preignition. So I don't see why almost everyone is putting premium in stock 8 1/2 to 1 comp motors.
Extreme HDF Member
Joined: Jun 2007
Posts: 12,653
Likes: 18
From: Broken Arrow, Oklahoma
I haven't tried running regular in either of mine. Someone that makes a lot more money than I do said it needs to run on 91 Octane or higher, so I haven't lived on the wild side and tested anything else.
Tourer
Joined: Dec 2010
Posts: 263
Likes: 7
From: Roswell, New Mexico
My 11 is bone stock and I run 91; like the manual states to run. With gas prices as cheap as they are, it shouldn't be an issue.
Also, when summer gets here and temps reach 100 degrees here; I don't want to worry about ping and detonation.
Also, when summer gets here and temps reach 100 degrees here; I don't want to worry about ping and detonation.
Big Kahuna HDF Member
Joined: Dec 2012
Posts: 322,622
Likes: 3,077
From: .....
After the first 6-9 months of running premium in my current bike, I switched to regular. I haven't seen, felt or noticed any difference. It still has the same power as it did with premium.
Stellar HDF Member
Joined: Oct 2010
Posts: 2,601
Likes: 189
From: east texas
I was wondering how many big twin owners with stock motors have tried reg gas? My 09 110 road glide needs 92 or it spark knocks bad. Prior to that I had a 05 and 07 that both ran better (road glides) on regular. 46 to 49 mpg always on the 05 and 44 to 47 on the 07. both of these bikes got at least 2/3 mpg worse on 92 oct.
My toy a 01 fxd is a 103 11/1 comp (at least) with hemi heads and runs on 92 octane with no preignition. So I don't see why almost everyone is putting premium in stock 8 1/2 to 1 comp motors.
My toy a 01 fxd is a 103 11/1 comp (at least) with hemi heads and runs on 92 octane with no preignition. So I don't see why almost everyone is putting premium in stock 8 1/2 to 1 comp motors.
All HD's have HEMI heads, since the side valve went away a log time ago.
Seasoned HDF Member
Joined: Jul 2007
Posts: 6,336
Likes: 67
From: SW Minnesota
I was wondering how many big twin owners with stock motors have tried reg gas? My 09 110 road glide needs 92 or it spark knocks bad. Prior to that I had a 05 and 07 that both ran better (road glides) on regular. 46 to 49 mpg always on the 05 and 44 to 47 on the 07. both of these bikes got at least 2/3 mpg worse on 92 oct.
My toy a 01 fxd is a 103 11/1 comp (at least) with hemi heads and runs on 92 octane with no preignition. So I don't see why almost everyone is putting premium in stock 8 1/2 to 1 comp motors.
My toy a 01 fxd is a 103 11/1 comp (at least) with hemi heads and runs on 92 octane with no preignition. So I don't see why almost everyone is putting premium in stock 8 1/2 to 1 comp motors.
F. I. TC 88's had 8.9 to 1, TC96 9.2 to 1, TC 103's are 9.6 to 1, and now 9.7 to 1. The 2014 Rushmore watercooled is 10.01 to 1. The current 110 engines are 9.2 to 1 . Your '09, if the specs I just looked up are correct, is 9.15 to 1. It also has, I believe, the hotter stock 255 factory cam, which probably gives you higher cylinder pressure, which is more relevant factor than compression ratios.
Last edited by MNPGRider; Jan 18, 2015 at 10:29 AM.
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Tourer
Joined: Jul 2007
Posts: 485
Likes: 12
From: New York
I ran nothing but regular in my 07 for the first few years I had it. I switched to super only because everyone else seemed to be using it. Couldn't tell the difference
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