Quote:
Originally Posted by razor02097
Unless your vehicle pulls timing when you use lower octane fuel you will not benefit from using a higher octane. Period. If the engine runs with full advance on 87 octane, using higher octane fuel will make zero difference.
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I have an UG and have it setup to show the timing advance. How do I know if it's at full advance?
Quote:
Originally Posted by Firestone66
The bare bone results I received on my 500km rides were this. Regular 87, 74 liters equally $74 at a controlled speed of 95km/h... Midgrade 89, 59 liters equally $62 at a controlled speed of 105km/h. That being said I saved twelve loonies and got to where I wanted to get, sooner... Spend more to save more...
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There is zero chance that going faster, regardless of octane, results in better fuel economy unless your truck shifts to a lower gear between 95kph and 105kph.