Quote Originally Posted by Jeepers View Post
Although non-ethanol, regardless of the octane rating will provide substantially better fuels mileage (octane rating has nothing to do with power) most of the non-ethanol fuels being sold do not have a detergent package. Over time this will produce carbon build up on pistons and will restrict fuel injectors. So besides paying more for non-ethanol fuel; you’ll need to kick in for a good fuel detergent.

If you do use non-ethanol fuel in your boat, add Techron or other detergent package at every fill up.


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Octane rating CAN absolutely has something to do with power IF tuned to take advantage of it.

General rule of thumb, for each point of octane, you can add appx 1 degree of timing which on a V8 engine is appx 8-10 additional HP.

Using 93 octane in an engine tuned for 87 will gain you nothing.

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