Author Topic: Question about Marvels Mystery Oil  (Read 577 times)

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Offline joeyvans

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Question about Marvels Mystery Oil
« on: April 14, 2015, 08:31:04 AM »
I cleaned out my tank rust the other day using 'The Works' method.  After neutralizing the acid wash, rinsing with water, then removing the water with denatured alcohol and compressed air, then fogging with wd40 and rinsing with gas.... I filled the tank to the neck with non-ethanol 91 octane and a shot of seafoam and proceeded to ride about 50 miles.  I topped off the tank with gas when I returned.  The next day I rode about 15 miles.  When I returned to my garage, I added about an ounce or a bit more of MMO to my tank and topped off with gas.  Tank interior was still a nice shiny steel. 

The next day I looked inside my tank and it seems to have developed an slight orangish color on the steel that has been covered by gasoline the entire time.  Like I said, I have topped the tank off immediately after each ride, so there has been very minimal oxygen inside the tank.   I have never used MMO in my gas, but have seen recommendations on it, so I thought I would try it. 

Somebody please tell me this orangish tint is due to the shot of MMO that I added!!??  Another thought was that maybe I didn't get the tank neutralized enough with the baking soda/water mix and it is still reacting? 

Thoughts anyone?  Thanks in advance!

1976 CB550 K2
Non-SOHC4 - 1974 CB450 K7
Non-SOHC4 - 1996 VFR750F

"No matter how much you shake and dance... the last three drops go in your pants."

Offline evanphi

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Re: Question about Marvels Mystery Oil
« Reply #1 on: April 14, 2015, 09:20:31 AM »
I cleaned out my tank rust the other day using 'The Works' method.  After neutralizing the acid wash, rinsing with water, then removing the water with denatured alcohol and compressed air, then fogging with wd40 and rinsing with gas.... I filled the tank to the neck with non-ethanol 91 octane and a shot of seafoam and proceeded to ride about 50 miles.  I topped off the tank with gas when I returned.  The next day I rode about 15 miles.  When I returned to my garage, I added about an ounce or a bit more of MMO to my tank and topped off with gas.  Tank interior was still a nice shiny steel. 

The next day I looked inside my tank and it seems to have developed an slight orangish color on the steel that has been covered by gasoline the entire time.  Like I said, I have topped the tank off immediately after each ride, so there has been very minimal oxygen inside the tank.   I have never used MMO in my gas, but have seen recommendations on it, so I thought I would try it. 

Somebody please tell me this orangish tint is due to the shot of MMO that I added!!??  Another thought was that maybe I didn't get the tank neutralized enough with the baking soda/water mix and it is still reacting? 

Thoughts anyone?  Thanks in advance!



My tank winterizing procedure, as recommended by a forum member, was to add about 1/2 bottle of MMO to an empty tank over the winter. Once a week I would turn the tank over and roll it around to coat the metal. When I added half a tank's worth of fuel this weekend for the first startup, it looked VERY orange when I looked in, and when I took the carb bowls off after to check them.

It's just the MMO!
--Evan

1975 CB750K "Rhonda"
Delkevic Stainless 4-1 Header, Cone Engineering 18" Quiet Core Reverse Cone, K&N Filter in Drilled Airbox
K5 Crankcase/Frame, K4 Head and Cylinders, K1 Carbs (42;120;1 Turn)

She's a mix-matched (former) basket case, but she's mine.

CB750 Shop Manual (all years), searchable text PDF
Calculating the correct input circumference for digital speedometers connected to the original speedometer drive

Offline joeyvans

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Re: Question about Marvels Mystery Oil
« Reply #2 on: April 14, 2015, 09:24:00 AM »
Phew! Thanks for the quick response, Evan! You made my day!
1976 CB550 K2
Non-SOHC4 - 1974 CB450 K7
Non-SOHC4 - 1996 VFR750F

"No matter how much you shake and dance... the last three drops go in your pants."

Offline evanphi

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Re: Question about Marvels Mystery Oil
« Reply #3 on: April 14, 2015, 09:30:24 AM »
This is why I normally use Seafoam as an additive for the first tank of gas... IT IS CLEAR!!! ;D :P
--Evan

1975 CB750K "Rhonda"
Delkevic Stainless 4-1 Header, Cone Engineering 18" Quiet Core Reverse Cone, K&N Filter in Drilled Airbox
K5 Crankcase/Frame, K4 Head and Cylinders, K1 Carbs (42;120;1 Turn)

She's a mix-matched (former) basket case, but she's mine.

CB750 Shop Manual (all years), searchable text PDF
Calculating the correct input circumference for digital speedometers connected to the original speedometer drive

Offline flybox1

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Re: Question about Marvels Mystery Oil
« Reply #4 on: April 14, 2015, 09:44:18 AM »
This is why I normally use Seafoam as an additive for the first tank of gas... IT IS CLEAR!!! ;D :P
+1
friends dont let friends feed their SOHC fours the 'pink' gas  ;D

kidding aside, its really not a bad thing to add to your fuel for a variety of reasons, but yeah, it turns your gas pink.
'78 750K (F3 engine) PD42b's, Modified airbox w/K&N  filter, 40/110 jets, 1 needle shim, IMS@ 1 turn out. Kerker + Cone 18" QuietCore

Past Bikes
1974 550K0 (stock), 1973 CB350F (stock), 1983 Yamaha XS400K (POS)
77/78 cool 2 member #3
"Knowledge without mileage equals bullsh!t" - Henry Rollins

"This is my CB. There are many like it, but this one is mineā€¦"