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May 13, 2011 · The octane rating tells you how resistant fuel is to premature detonation, i.e. burning before it's meant to. It's quite a long explanation, depending on how much you already know. The short answer is that high octane fuel allows you to fire the spark plug closer to the optimal point during the compression stroke to allow the engine to perform at its best.
Jul 25, 2011 · The compression is 10.5-1. I used 87 octane for awhile and then switched to 89. My performance improved and my MPG went up by 2 miles in city driving and 3 MPG on the highway. I have stayed with 89 octane since. It has always been told to me that the higher the compression ratio of the engine required a higher octane.
The lower the octane the less pressure it can handle. The higher the octane the more pressure required for it to explode. The octane rating for a vehicle can usually be found inside the owners manual (depending on your area you should see at least three of these as your average pump 87,88,89,90,91,93). The octane rating the vehicle comes with ...
Higher-octane fuels are pointless in an engine designed for low-octane fuel, but engines designed for high-octane fuels will achieve better performance when run with high-octane fuels. When you let gasoline sit, the components with the lowest boiling points will evaporate first, IMO this is more likely to leave you with a high-octane fuel.
After seeing this, my main question isn't to ask about Premium vs. Regular octane levels, but rather I'm curious about if such fuel is safe to use in your typical stock engine on a passenger car, and in addition whether this "Racing Fuel" has anything more than extra octane because I know Sunono Super Premium is typically 10-20 cents higher than premium.
Apr 15, 2016 · Here in the UK regular gas has 5-10% ethanol but I use Shell V-power which is 99 octane and ethanol free (and more expensive) with Briggs and Stratton preservative in full tanks in my old motorcycles over the winter. In my lawn mowers the same stuff works fine in regular gas. Full tanks stop them getting rusty.
Apr 10, 2016 · The reason why we have Octane types is because the lower-octane fuels tend to ignite at lower temperatures (ie. hot metal parts inside the combustion chamber, rather than the spark plug firing) or lower compression pressures (ie. the compression fires the engine like a diesel engine works).
Forced induction motors like octane - the high pressure, high compression, and most importantly high combustion temperatures make you more prone to detonation. There are enough electronics in the engine (knock sensor for one) to realize that something is amiss and it will usually pull (retard) engine timing to compensate as a safety measure.
I would suggest checking the owners manual to see what Sabb requires for a minimum octane fuel.It should be 93 octane for your motor.That being said higher octane fuel will not help the turbo last longer.Octane ratings are a measure of the fuels ability to resist engine knock.Engine knock is caused by fuel ignition with the piston in the incorrect position.Engine knock will cause engine damage and shorten it's life but won't effect the turbo.What you can do to increase the turbo's life is ...
Oct 3, 2023 · In earlier versions of the engine, before the turbo was installed, it needed 87 octane. Unfortunately, the rubber and sealants used are known to be ethanol sensitive, so the engine needs ethanol-free gas. We can only get ethanol-free 90 octane locally, and I wonder about how to think about octane rating vs. boost.
