Premium or Regular Unleaded? - Stromtrooper Forum : Suzuki V-Strom Motorcycle Forums
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post #1 of 27 Old 04-10-2006, 03:19 PM
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Premium or Regular Unleaded?

I have 600 miles on my new 06 blue/silver 650 Strombucker. I have been filling her up with premium unleaded, but wondered what other people are using? Is there any noticeable performance difference with premium vs. regular unleaded? This bike is soooo cool. Thanks to all you Stromtroopers out there for all the great information on this site.
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post #2 of 27 Old 04-10-2006, 03:23 PM
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Regular is more than enough. Anything above 87 octane is a waste of money.

2005 DL650
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post #3 of 27 Old 04-10-2006, 04:32 PM
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Bike is made to run on 87. I have hear it can over time it cause problems if you run the higher octane fuels.

650...Anything more than a handfull is wasted
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post #4 of 27 Old 04-10-2006, 07:36 PM
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Without getting into the physics behind octane ratings etc. The simple explanation is this. Octane is a requirement of compression. The higher the compression pressure the higher the octane needed. Suzuki has built this engine with a compression pressure requiring regular gasoline. Unless you experience knocking or pinging just use what is called for. You will get less performance out of the premium fuel because it won't burn properly.
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post #5 of 27 Old 04-10-2006, 11:08 PM
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I too have used the lowest octane the engine requires. Here is a good link from my local cycle shop in Madison Wisconsin. Sounds logical to me.
http://www.motorcycleperf.com/techtips/gasoline.htm

PS -- i don't spell or grammar check in most cases, but props if you can use my quick typing to debunk the factual foundation of my arguments!!
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post #6 of 27 Old 04-11-2006, 12:49 AM
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18K+ miles on 87 octane. . . . .Zero Issues, runs strong, no pinging, no hassles!

:hand: [I]Experience is a hard teacher because the test is first, the lesson afterward. [/I]
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post #7 of 27 Old 04-11-2006, 02:15 AM
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Glad I ran across this post. I had always heard that Premium was needed because of the higher compression ratio, but maybe that is bogus info. I will do some more reading and then give it a try and see what the results are. Definitely would like to save .20 cents a gallon on my fuel bill!
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post #8 of 27 Old 04-11-2006, 05:03 PM
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I said I wasn't going to drag this out but there needs to be a little more explanation about compression. The advertised compression of an engine is entirely different than the cylinder compression pressure. If you take 2 engines with a listed compression ratio of 11:1 and put different camshafts into them you will end up with different cylinder pressures. The explanation for this is camshafts determine when the valves open and close. If you want an engine to run better at a certain r.p.m. range you put in a different camshaft. How early (in the crank rotation position) it opens and how late it closes will determine how much pressure will build up in the cylinder so don't just look at the advertised ratio and say "well my buddy has a 4 cylinder bike and his compression is the same as mine and he has to use premium so therefore I have to use it also". Use what the manufacturer recommends. They built the engine, they would know better than anyone what gasoline it's supposed to burn.
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post #9 of 27 Old 04-11-2006, 05:40 PM
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Gbritnell, nice post. Makes a lot of sense and now I have more for my knowledge base. Thank you.

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post #10 of 27 Old 04-12-2006, 03:32 AM
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Quote:
Originally Posted by gbritnell
I said I wasn't going to drag this out but there needs to be a little more explanation about compression. The advertised compression of an engine is entirely different than the cylinder compression pressure. If you take 2 engines with a listed compression ratio of 11:1 and put different camshafts into them you will end up with different cylinder pressures. The explanation for this is camshafts determine when the valves open and close. If you want an engine to run better at a certain r.p.m. range you put in a different camshaft. How early (in the crank rotation position) it opens and how late it closes will determine how much pressure will build up in the cylinder so don't just look at the advertised ratio and say "well my buddy has a 4 cylinder bike and his compression is the same as mine and he has to use premium so therefore I have to use it also". Use what the manufacturer recommends. They built the engine, they would know better than anyone what gasoline it's supposed to burn.
gbritnell
This thread is definitely not for the mechanically declined folks! Yikes, this stuff makes Stromette's brain hurt! I just wanted to vote for REGULAR GAS. I ran mid-grade once b/c I was in nowhereville and they were out of regular. Can't say I noticed any difference. Why pay more when regular gets the job done?

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