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Author Topic: Oil (?) in bottom of NOS gas tank  (Read 412 times)

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Online jwurbel

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Oil (?) in bottom of NOS gas tank
« on: May 13, 2023, 06:03:07 PM »
Got around to finally mount NOS tank that has sat in original box for last 35 years.  Found oil (?) in bottom of tank when I went to attach petcock.  I assume it was placed there to prevent rust?

Rinse out with gas or something else?
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Online newday777

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Re: Oil (?) in bottom of NOS gas tank
« Reply #1 on: May 13, 2023, 06:20:09 PM »
Yes and yes
I put 2 stroke oil in after de-rusted to preserve the tanks I clean.

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Stu
Honda Parts manager in the mid 1970s Nashua Honda
My current rides
1975 K5 Planet Blue my summer ride, it was a friend's bike I worked with at the Honda shop in 76, lots of fun to be on it again
1976 K6 Anteres Red rebuilding project, was originally my brother's that I set up from the crate, it'll breath again soon!
Project 750s, 2 K4, 2 K6, 1 K8
2008 GL1800 my daily ride and cross country runner

Prior bikes....
1972 Suzuki GT380 I had charge of it for a year in 1973 while my friend was deployed and learned to love street riding....
New CB450 K7 after my friend returned...
New CB750 K5 Planet Blue, demise by ex cousin in law at 9,000 miles...
New CB750 K6 Anteres Red, to replace the totaled K5, I sold this K6 at 45k in 1983, I had heavily modified it, many great memories on it and have missed it greatly.....
1983 GL1100A, 1999 GL1500 SE, 1999 GL1500A

Online newday777

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Re: Oil (?) in bottom of NOS gas tank
« Reply #2 on: May 13, 2023, 06:21:53 PM »
Back in the 70s the owners manual said for long term storage to empty the gas and fog the tank with light oil.
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Stu
Honda Parts manager in the mid 1970s Nashua Honda
My current rides
1975 K5 Planet Blue my summer ride, it was a friend's bike I worked with at the Honda shop in 76, lots of fun to be on it again
1976 K6 Anteres Red rebuilding project, was originally my brother's that I set up from the crate, it'll breath again soon!
Project 750s, 2 K4, 2 K6, 1 K8
2008 GL1800 my daily ride and cross country runner

Prior bikes....
1972 Suzuki GT380 I had charge of it for a year in 1973 while my friend was deployed and learned to love street riding....
New CB450 K7 after my friend returned...
New CB750 K5 Planet Blue, demise by ex cousin in law at 9,000 miles...
New CB750 K6 Anteres Red, to replace the totaled K5, I sold this K6 at 45k in 1983, I had heavily modified it, many great memories on it and have missed it greatly.....
1983 GL1100A, 1999 GL1500 SE, 1999 GL1500A

Online jwurbel

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Re: Oil (?) in bottom of NOS gas tank
« Reply #3 on: May 13, 2023, 06:43:40 PM »
So just forget about it?
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Offline Johnie

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Re: Oil (?) in bottom of NOS gas tank
« Reply #4 on: May 13, 2023, 06:55:07 PM »
So outboard motor fogging oil is okay, right? Easier to use as it comes in an aerosol and you can cover the sides vs only the bottom.
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1970 CB750K0 - Candy Ruby Red
1973 CB750K3 - Candy Bacchus Olive or Sunflake Orange
1970 Chevy Chevelle SS396 - Cortez Silver
1976 GL1000 Sulphur Yellow

Oshkosh, WI  USA

Offline CycleRanger

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Re: Oil (?) in bottom of NOS gas tank
« Reply #5 on: May 13, 2023, 07:02:25 PM »
Quote from: jwurbel on May 13, 2023, 06:03:07 PM
Got around to finally mount NOS tank that has sat in original box for last 35 years.  Found oil (?) in bottom of tank when I went to attach petcock.  I assume it was placed there to prevent rust?

Rinse out with gas or something else?

There's nothing quite like that new tank smell!  ;D

Yeah, just rinse it out with a little gas and you should be good to go.
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Offline Lucien Harpress

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Re: Oil (?) in bottom of NOS gas tank
« Reply #6 on: May 13, 2023, 07:03:44 PM »
Yeah, it'll be fine.  The gas will dilute the oil well enough, and apart from MAYBE being a touch smokey for a little bit, the engine won't care.  Plenty of engines with bad valve seals burn oil just fine.
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Online newday777

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Re: Oil (?) in bottom of NOS gas tank
« Reply #7 on: May 13, 2023, 08:40:28 PM »
Quote from: Johnie on May 13, 2023, 06:55:07 PM
So outboard motor fogging oil is okay, right? Easier to use as it comes in an aerosol and you can cover the sides vs only the bottom.
I just pour in a few Oz and swirl the tank around to coat all the surfaces.
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Stu
Honda Parts manager in the mid 1970s Nashua Honda
My current rides
1975 K5 Planet Blue my summer ride, it was a friend's bike I worked with at the Honda shop in 76, lots of fun to be on it again
1976 K6 Anteres Red rebuilding project, was originally my brother's that I set up from the crate, it'll breath again soon!
Project 750s, 2 K4, 2 K6, 1 K8
2008 GL1800 my daily ride and cross country runner

Prior bikes....
1972 Suzuki GT380 I had charge of it for a year in 1973 while my friend was deployed and learned to love street riding....
New CB450 K7 after my friend returned...
New CB750 K5 Planet Blue, demise by ex cousin in law at 9,000 miles...
New CB750 K6 Anteres Red, to replace the totaled K5, I sold this K6 at 45k in 1983, I had heavily modified it, many great memories on it and have missed it greatly.....
1983 GL1100A, 1999 GL1500 SE, 1999 GL1500A

Offline chiefum

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Re: Oil (?) in bottom of NOS gas tank
« Reply #8 on: May 13, 2023, 08:56:31 PM »
Quote from: Johnie on May 13, 2023, 06:55:07 PM
So outboard motor fogging oil is okay, right? Easier to use as it comes in an aerosol and you can cover the sides vs only the bottom.

That's what I used on my chopper tank after cleaning it out.
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