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Fuel octane
Engine, Fuel and Exhaust
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Jun 16th, 2007, 03:24 AM
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Banned
Ride: .
Join Date: Apr 7th, 2007
Posts: 564
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Fuel octane
After having had 2 Harleys that I bought 2nd hand I have now bought a new Ultra. As I would like to keep her in top condition for as long as possible I would like to ask you all what sort of fuel to go for. I live in England and the choises here are 95 and 98/99 octane.(the high octane goes well over $2.03/ltr) Bikes destined for the UK, I'm sure, are modified to take this high octane as I know in the US it's much lower (isn't the max 92, sold by Shell?) but does it make sense to go for the highest rating when it comes to being better for the bike. I'm not looking for more performance, I bought the bike to relax . If I want to get somewhere fast I take a train/plane. (the high octane goes well over $2.00/ltr) Any advise would much appreciated. |
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Jun 16th, 2007, 06:52 AM
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Warming The Wheels
Ride: 2008 Ultra Classic w/Motor Trike Kit
Join Date: Jan 6th, 2007
Location: Middle Tennessee
Posts: 129
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Re: Fuel octane
HarleyHarry - Hobbit is correct with what he told you but let me add one further comment. H-D makes an Fuel Additive that I have used in my ride. Sells for $5.95USD and treats 8 tanksful (if you have a 5 gal tank). I use regular unleaded gas (89 octane - much lower price), add one measured amount of the booster and it runs as if I had put the high price stuff in it. No pinging of the pistons at all. It's called "Genuine Fuel Additive" and the H-D part number is 99893-91A.
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Jun 16th, 2007, 10:38 AM
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Warming The Wheels
Ride: 2007 Heritage Softtail Classic
Join Date: Apr 19th, 2007
Location: Thompsons Station, Tennessee
Posts: 130
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Re: Fuel octane
Quote: Originally Posted by leapfreak
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HarleyHarry - Hobbit is correct with what he told you but let me add one further comment. H-D makes an Fuel Additive that I have used in my ride. Sells for $5.95USD and treats 8 tanksful (if you have a 5 gal tank). I use regular unleaded gas (89 octane - much lower price), add one measured amount of the booster and it runs as if I had put the high price stuff in it. No pinging of the pistons at all. It's called "Genuine Fuel Additive" and the H-D part number is 99893-91A.
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2007 FLSTC Heritage Classic V&H Q-Series Double Barrel Staggers SE Stage 1 air breather, V&H Fuelpak |
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Jun 21st, 2007, 08:11 PM
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#4 |
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Frozen Account
Ride: 07 Road King
Join Date: Jun 21st, 2007
Posts: 25,999
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Re: Fuel octane
I find that a drop from Sunoco 93 to 91 actually makes it run better. The higher octane will also run a bit hotter too.
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