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What Fuel for 79 GS1000?

  • Thread starter Thread starter fishnetter
  • Start date Start date
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fishnetter

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It's been so many years my 79 GS1000 has been apart, i have forgotten what fuel to run. 87,89,91 octane.what do you run in a stock bike this model & year? Thanks!!
 
95 over here - our 'regular' petrol (petrol = gasoline in English English :D). Bike runs fine on it.

Used to run fine on 91 (the old 'two-star') but we can't get that anymore.
 
95 is our lowest octane aswell, but I think 85 will be just fine.
 
85 or 87, depending on what you have in your part of CA will do you just fine. Don't waste your money on the higher octane stuff
 
I think there are different rating systems in different locals. My owners manual says to use 85 -95 octane, if pinging occurs increase octane. I've always used 85 here at 5000 ft. elevation and above with no problems. At sea level you may need higher rating. Ray
 
You guys must have a different rating system

Rule of thumb, lowest octane it doesn't ping on/ I use 87 or 89 depending on how hot it is and whether I'm scaling mountains that day
 
The US of A uses a different rating system than the rest of the world.

Regular old 87 octane is what you need.

Ride up to the pump and proudly buy the cheap stuff.
 
Hi Mr. fishnetter,

With you being in California, the cheap stuff will do your bike just fine. I use ARCO gas a lot. Once in a while I put in a tank of Chevron. Heck, I'll even use the no-name 87 octane stuff. Periodically I'll use a few ounces of Sea Foam for maintenance. I've had no problems. If your bike is stock, you won't either.



Thank you for your indulgence,

BassCliff
 
I'm with Cliff Arco. Only because they are usually the cheapest and it's convenient.
87 octane. If you have problems with your bike pinging, but otherwise runs good ? Check your intake boots for leaks
 
Sorry. i will never put Arco anything in any of my vehicles! period, i spend a couple more bucks, and put Chevron in it. i think taht would be best!
 
I've run 87 in every GS I have had and that is all of them except shaft drive models and a 650E. Never had a problem.

Earl
 
petrol

petrol

95 octane or super unleaded Esso or Shell deffently not supermarket petrol.
get alot more miles out of a tank full on super unleaded fuel, handy on a long run.
 
Last edited:
The method of rating octane in gasoline in the United States changed in the late 70's/early 80's IIRC.
The rating found in your owners manual is based on the old system of rating octane.
Basically, 87 octane in your OM is equivalent to 89 octane using today's method (in the U.S.A.)

Try this: http://www.csgnetwork.com/octaneratecalc.html

Daniel
 
In the midwest U.S. the superunleaded at the pump is an ethanol (alcohol) blended gasoline and typically rated at 89 octane.
Do any of you use this in your old GS's I've stayed away from the alcohol blends up to this point for my bike's but run it in all my autos since it is cheaper and higher octane.
 
K-Log said:
In the midwest U.S. the superunleaded at the pump is an ethanol (alcohol) blended gasoline and typically rated at 89 octane.
Do any of you use this in your old GS's I've stayed away from the alcohol blends up to this point for my bike's but run it in all my autos since it is cheaper and higher octane.
Click to expand...


I cant recall the last gas pump I've seen that did not say, "contains up to 10% ethanol".
 
I'm sure in some locals that is appropriate, since I believe the gas gets mixed somewhat. Here in Ne. The pump choices are 87 octane unleaded and 89 octane super-unleaded w ethanol.
I don't use the ethanol blend as I didn't know how the old bike would react. Octain, it sounds like a safe bet you use the ethanol blended product with no ill effects? Is there a noteable performance increase with the 89 octane?
 
K-Log said:
Octain, it sounds like a safe bet you use the ethanol blended product with no ill effects? Is there a noteable performance increase with the 89 octane?
Click to expand...

Never tried it in the Suzuki. Although I have tried it in my Toyota Pre-Runner and the only thing I notice is a bit better milage.
 
New

New

Whoaaaa. I don't think this question has come up for almost a week!!:-k
 
I've noticed lately - past year+ - that if anything I'm riding/driving has been acting oddly (fuel related) that I had just been to a Shell station. I'm not trying to knock Shell because I had always defended them but then fuels came up on another Mfr forum and after multiple people commented on Shell, I started to pay attention. Point being... maybe you steer clear of Shell till you're happy with how she behaves in general so as to not perceive a problem where there might not be one. Otherwise, as stated before, start low and increase as conditions require.
 
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