Return to the home page...

Go Back   Moyer Marine Atomic 4 Community - Home of the Afourians > Discussion Topics > Fuel System

Reply
 
Thread Tools Display Modes
  #1   IP: 99.7.118.97
Old 06-12-2018, 05:08 PM
bcbristoll bcbristoll is offline
Senior Member
 
Join Date: Apr 2018
Location: St. Francis, Wis.
Posts: 18
Thanks: 0
Thanked 0 Times in 0 Posts
Type of fuel for atomic4

Hey everyone just wondering what type of fuel to use in my atomic4. The downloaded manual I have suggests 90 octane....In our area reg is 87 midrange 89 and premium ~92. I've know that you don't want to use anything with ethanol but just wondering what is the best choice??
Reply With Quote
  #2   IP: 172.95.97.58
Old 06-12-2018, 05:18 PM
Dave Neptune Dave Neptune is online now
Afourian MVP, Professor Emeritus
 
Join Date: Jan 2007
Location: Grove, Oklahoma
Posts: 5,035
Thanks: 711
Thanked 1,289 Times in 839 Posts
bcbristol, those old rating numbers are far different than todays. The 90 was an leaded regular grade of gasoline good for up to about 8:5 to 1 compression where as the new regular unleaded is good for up to 10:1.

Our A-4's are at 6.5:to 1 so finding a good fast burning fuel is problematic. Your best bet is todays regular unleaded without the ethanol if you can find it. If we could find some 83 rated regular things would be great.

You will make more HP and torque with regular fuel and such low compression. Running premium is a waste of time money and horse power.

Dave Neptune
Reply With Quote
The Following User Says Thank You to Dave Neptune For This Useful Post:
sastanley (06-16-2018)
  #3   IP: 24.224.194.51
Old 06-12-2018, 05:38 PM
Mo's Avatar
Mo Mo is offline
Afourian MVP
 
Join Date: Jun 2007
Location: Halifax NS,
Posts: 4,470
Thanks: 292
Thanked 411 Times in 272 Posts
Shell v-power currently doesn't have ethanol in Canada ( I looked up BC) that's the high octane. Here in NS there's no ethanol in high test either. I have used high test in the A4 since the ethanol came out here in the lower grades...works fine.
__________________
Mo

"Odyssey"
1976 C&C 30 MKI

The pessimist complains about the wind.
The optimist expects it to change.
The realist adjusts the sails.
...Sir William Arthur Ward.
Reply With Quote
  #4   IP: 99.7.118.97
Old 06-13-2018, 09:26 AM
bcbristoll bcbristoll is offline
Senior Member
 
Join Date: Apr 2018
Location: St. Francis, Wis.
Posts: 18
Thanks: 0
Thanked 0 Times in 0 Posts
Thanks for the info. Just trying to be sure.
Reply With Quote
  #5   IP: 67.149.7.16
Old 06-14-2018, 08:50 AM
Robs Hubris Robs Hubris is offline
Senior Member
 
Join Date: Apr 2015
Posts: 37
Thanks: 29
Thanked 4 Times in 4 Posts
After using regular unleaded for years, I switched to regular leaded (more expensive, sold by marina station here in Michigan). I have noted immediate and lasting improvements in my old A4's performance. Just a happier engine.
best,
rob
__________________
Hubris
Catalina 30 on Lake St. Clair, Michigan
Reply With Quote
The Following User Says Thank You to Robs Hubris For This Useful Post:
Graham (06-14-2018)
  #6   IP: 174.199.13.209
Old 06-16-2018, 04:49 PM
Splash1 Splash1 is offline
Frequent Contributor
 
Join Date: Apr 2018
Posts: 5
Thanks: 2
Thanked 1 Time in 1 Post
I just came back from Florida where I saw a gas station (Wawa brand) that sold gasoline with no ethanol for boaters only. Thanks to all for the tips.
David Dill
Pearson 30 #319
Middleton RI
Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Polishing Filter GregH Fuel System 27 05-05-2018 11:43 PM
Engine runs for a couple minutes, stops hard, no fuel flow pdecker Troubleshooting 30 05-28-2015 01:17 PM
Fuel Shutdown Issue gdasw Fuel System 17 06-20-2013 08:53 AM
Fuel-Related Engine Shutdowns Don Moyer Fuel System 32 02-18-2011 04:36 PM
Facet fuel pump notes rigspelt Fuel System 3 01-03-2009 01:31 PM


All times are GMT -4. The time now is 01:48 AM.


Powered by vBulletin® Version 3.8.9
Copyright ©2000 - 2024, vBulletin Solutions, Inc.


Universal® is a registered trademark of Westerbeke Corporation

Copyright © 2004-2024 Moyer Marine Inc.

All Rights Reserved