Break in oil

Aircraft powered airboat discussion.
Post Reply
Dirtman
Site Supporter - IV
Site Supporter - IV
Posts: 297
Joined: Sun Aug 18, 2013 5:08 pm
Location: St.Cloud FL

Break in oil

Post by Dirtman » Tue Jul 23, 2019 9:30 pm

Getting ready to crank up a GSO540 that has had the cylinders re-done Didn't do anything to the bottom end except look it over and everything there(bearings and cam) looked good. I believe I should use the mineral oil for break in. Does anyone know if Phillips makes a mineral oil or are all of their 50wt. products AD oils. I went to their website and all of the straight weight oils look as if they AD oils. I'll use AeroShell if I have to but damn they are proud of it.
IO520 on a 12"6" Lazer with a 72" Q #20814
Build in progress: 14x7'9" JB w/ GSO540 &80" Razor

User avatar
Slidin Gator
Site Supporter - IV
Site Supporter - IV
Posts: 656
Joined: Sat Feb 03, 2018 11:33 pm
Location: Jupiter Farms, Florida

Re: Break in oil

Post by Slidin Gator » Tue Jul 23, 2019 11:02 pm

All I have ever found from Phillips is Ashless Dispersant (AD). It's Aeroshell 100 Mineral oil on my cylinder break ins.

$75/case, fill her up and move on.
I grew up thinking I-10 was the Mason Dixon line.
1986 Airboat Engineering Inc., 14' Marsh Master. Refreshed narrow deck, SV O-540, 72” NGQ. A Bob Stossel original.

Dirtman
Site Supporter - IV
Site Supporter - IV
Posts: 297
Joined: Sun Aug 18, 2013 5:08 pm
Location: St.Cloud FL

Re: Break in oil

Post by Dirtman » Wed Jul 24, 2019 8:33 am

Sliden Gator where are you finding it for 75 a case ? Local NAPA has it for 100 around around here.
IO520 on a 12"6" Lazer with a 72" Q #20814
Build in progress: 14x7'9" JB w/ GSO540 &80" Razor

CypressHunter
Southern Airboat Member
Posts: 308
Joined: Thu Mar 18, 2010 6:32 pm
Location: Melbourne, FL

Re: Break in oil

Post by CypressHunter » Wed Jul 24, 2019 10:12 am

Dirtman wrote:Sliden Gator where are you finding it for 75 a case ? Local NAPA has it for 100 around around here.
Just me personally if I just dropped a bunch of money in a motor what’s an extra $100 on the right oil
13' 6'' Cotton Mouth 220 GPU 70'' signature series

User avatar
Slidin Gator
Site Supporter - IV
Site Supporter - IV
Posts: 656
Joined: Sat Feb 03, 2018 11:33 pm
Location: Jupiter Farms, Florida

Re: Break in oil

Post by Slidin Gator » Wed Jul 24, 2019 4:06 pm

My local NAPA only has 100W. I have bought at the airport, Fast Break in Okeechobee and elsewhere. The price does vary for sure.

$75 was just off the cuff. Here is one option at $79 per case plus shipping:
https://www.aircraftspruce.com/catalog/ ... bwQAvD_BwE
I grew up thinking I-10 was the Mason Dixon line.
1986 Airboat Engineering Inc., 14' Marsh Master. Refreshed narrow deck, SV O-540, 72” NGQ. A Bob Stossel original.

Dirtman
Site Supporter - IV
Site Supporter - IV
Posts: 297
Joined: Sun Aug 18, 2013 5:08 pm
Location: St.Cloud FL

Re: Break in oil

Post by Dirtman » Wed Jul 24, 2019 6:58 pm

Thanks for the reply Slidin. Went to the local Dist. today and picked some up. Hope to spin it over this weekend and then off to the Ignition guy.
IO520 on a 12"6" Lazer with a 72" Q #20814
Build in progress: 14x7'9" JB w/ GSO540 &80" Razor

Post Reply

Return to “Aircraft Power Only”