Oz petrol
#7
09-19-2006, 11:17 AM
Join Date: Aug 2005
Location: Gold Coast, Australia
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#8
09-19-2006, 12:45 PM
#9
09-19-2006, 10:05 PM
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Location: Huntingtown, MD (USA)
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RE: Oz petrol
True it burns slower but that gives you a more powerful combustion stroke. My bike loves 93, so thats what I give her.
MDFF
High grade gas:
High grade gasoline is made of longer molecular chains. Gas is usually rated in octane's which is some what misleading (see below) because octane's are a 8 molecular group chain in the petroleum family. It is the slowest burning gas, giving you a longer, and more even power stroke. It also burns colder, which is especially important for those of you that live in hot areas or if your car is prone to overheating. Running high grade will keep it cooler. It also tends to burn more completely, leaving less deposits and not sending as much back out the tail pipe.
High grade gasoline is made of longer molecular chains. Gas is usually rated in octane's which is some what misleading (see below) because octane's are a 8 molecular group chain in the petroleum family. It is the slowest burning gas, giving you a longer, and more even power stroke. It also burns colder, which is especially important for those of you that live in hot areas or if your car is prone to overheating. Running high grade will keep it cooler. It also tends to burn more completely, leaving less deposits and not sending as much back out the tail pipe.
#10
09-20-2006, 11:42 AM
RE: Oz petrol
[quote]ORIGINAL: mdfirefighter
True it burns slower but that gives you a more powerful combustion stroke. My bike loves 93, so thats what I give her.
[qoute]
You are right. Temperature plays a part in octane choice. If your bike is running hot you will benefit from higher octane. Also if your compression is increased, you can benefit. With a 4-1 collector system you get a free boost raising compressing and tend to need to increase octane. If you had a bike with fuel injection, the knock sensor would advance the timing to the point of knock and retard it a tad making the best power for any given octane. A stock bike running at normal tempature should not see any benefit from higher octane.