Ditto on thatQuote:
Originally Posted by viking
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Ditto on thatQuote:
Originally Posted by viking
premium? ive never used premium in my boat...
89 is all you need. 91/92/93 is a waste of money.
many many many studies done on using premium in cars/boats/mc's that do not require it and you are wasting money. premium is only for high compression or force fed motors in most cases..
you can actually do more harm than good by burning higher octane than what the engine was designed for. it doesn't burn clean.
In my neck of the woods, we have 3 choices. 87 which i wont run in my boat. 91 Non Ethanol which is what i run. #2 Diesel for the rig.
If im not in my little town when i buy fuel for the boat its always 89 as thats what it says to put in it.
never used anything other than 87. never had a detonation issues that i know of. runs like a champ
Most ecus can retard timing enough to make up for lower octane gas. Mightbe leaving a few hp on the table tho..
Ditto on that!!Quote:
Originally Posted by mmandley
Just one thing to add. Have had issues on 2 separate vehicle running 87 with ethanol and the engine light coming on. Put some good premium fuel in and takes care of the issue (DTC) warning.
Ditto-Quote:
Originally Posted by sandm
My second vehicle is supercharged. If you use regular and stomp on it…good luck. I use stabil ethanol treatment and will top off a 3/4 tank in the boat with 93. Otherwise, regular it is.
matt, key word there is supercharged, your combustion chamber pressures are much higher than that of a NA engine. maybe next fill up I will use premium in the ole moomba and see if there is a diffQuote:
Originally Posted by matt75
rd, if you are using the recommended 89, you will not see any difference in the performance of the boat. seen enough sites that show it will have no noticeable benefits in the performance, especially since you're only source of data is "seat of the pants".
now internals are another story..
there's tons of websites out there that have facts stating both ways; that using higher octane fuels is ok and that using higher octane fuels can be bad for the internals in the long run.
I have no personal experience one way or the other, but I'll chose to save the coin and use what the manufacturer recommends. there's a reason they spec 89 octane for the boat and not 87 or 92/93.
The problem we have is that 89 here is always an ethanol blend, so it's either 87 or 91.
I've never used anything other than 87. Didn't even know 89 was recommended. Here everything has ethanol in it.
I've was checking out the new indmar site and it looks like all of their new 330hp and 345hp are designed for regular unleaded.
I also checked out the web site and noticed in the pictures of the engines they have changed the exhaust manifolds. Yes they now have cats standard, but the tubing from the heads to the cats is no longer water jacketed. Along with some other evolutionary changes.Quote:
Originally Posted by bzubke1
On mine, Indmar calls for 89, I usually run 87 w/o any problems. I may run 89 or higher towards the end of the season to get the enthanol level down in the tank. The higher octane stuff is usually ethanol free depending on the station.
Currently regular 87 is $3.50 gal. I hope it stays under $4 for the summer.
I hope it's under 3.50 as well. If not- I'm not going to be so excited filling up all of the ballast every outing.
I find it odd that the higher octane fuels have less or no ethanol content in some of yalls states. Ethanol has a higher octane rating than gasoline which is why some E85 vehicles generate more horsepower with E85 than they do with regular E10. The higher octane rating of the E85 allows them to advance timing and squeeze a few extra hp out. I would think that 91 or 93 octane gasoline would contain just as much ethanol as 87.