I just installed a new fuel pump in my '94 Grand Cherokee and let me tell you. Dropping a tank that's covered by a hitch and skid plate takes more than just one six pack.
That would be the third pump for this vehicle, and I never drive with less than 1/2 a tank. Should of taken my buddies advice and used a lubricant in the fuel.
My recent trip to the auto parts store provided only two solutions. 1. Marvel Mystery Oil, 2. Dura-Lube Upper Cylinder Lube. #1 smells minty, #2 smells like vanilla extract. Can both be used in cooking... eh probably not.
I was concerned, however, that either one would settle to the bottom of the tank and do nothing for my pump.
So I took two test-tubes and filled a mix of each oil and fuel together to see if any of the two settle out.
This was the first addition of fuel to the oils. Not a practical real-world example since I did not simply "dump" the fuel in like a pump does. This lead to an interesting observation though as I could see that the MMO began to disperse itself through the oil. The Dura-Lube product did not, it simply sat on the bottom.
I then agitated the two tubes by hard shaking and looked some more.
Both oils mixed with the oil quite well. I did roughly 25% by volume oil and 75% by volume fuel. But I over did it on the MMO as you can see. Ah well I overdose on that stuff anyhow.
I left both tubes overnight and checked the following day...
To my surprise both samples still were a uniform solution. Neither one showed signs of settling out. I then put on some nitrile gloves and wetted my fingers to see if both mixes were slippery, not a scientific method but ah well. Both seemed about the same, none more slippery than the other which was odd since the Dura-Lube product is much thicker when you shake it around in the bottle. Both also left behind an expected oily residue when the fuel is allowed to evaporate.
So which did I go for? MMO, I can get the 32oz size for cheaper than the one-dose treatment Dura-Lube product. Keep in mind I don't have fuel economy in mind here, since the vehicle is anything but economical. I am, however, looking for something to extend the life of the pump and injectors maybe even function as a UCL.
I've been using MMO for a few days now and the pump does sound quieter. I listened to it before and after, and the after is toned down. Unless it's just the pump breaking in.
I'll attempt to do a burn test in a lab to see what pH value the ash comes out of for the MMO. And get my hands on some of that FP60 stuff I've heard so much about, but I can't find it locally. So I'll have to wait for it to ship.
Anyways thought I'd share this, be it not very interesting. Anyone ever mix MMO with 2-stroke oil? I wonder if that would add to the top end lube qualities?
That would be the third pump for this vehicle, and I never drive with less than 1/2 a tank. Should of taken my buddies advice and used a lubricant in the fuel.
My recent trip to the auto parts store provided only two solutions. 1. Marvel Mystery Oil, 2. Dura-Lube Upper Cylinder Lube. #1 smells minty, #2 smells like vanilla extract. Can both be used in cooking... eh probably not.
I was concerned, however, that either one would settle to the bottom of the tank and do nothing for my pump.
So I took two test-tubes and filled a mix of each oil and fuel together to see if any of the two settle out.
This was the first addition of fuel to the oils. Not a practical real-world example since I did not simply "dump" the fuel in like a pump does. This lead to an interesting observation though as I could see that the MMO began to disperse itself through the oil. The Dura-Lube product did not, it simply sat on the bottom.
I then agitated the two tubes by hard shaking and looked some more.
Both oils mixed with the oil quite well. I did roughly 25% by volume oil and 75% by volume fuel. But I over did it on the MMO as you can see. Ah well I overdose on that stuff anyhow.
I left both tubes overnight and checked the following day...
To my surprise both samples still were a uniform solution. Neither one showed signs of settling out. I then put on some nitrile gloves and wetted my fingers to see if both mixes were slippery, not a scientific method but ah well. Both seemed about the same, none more slippery than the other which was odd since the Dura-Lube product is much thicker when you shake it around in the bottle. Both also left behind an expected oily residue when the fuel is allowed to evaporate.
So which did I go for? MMO, I can get the 32oz size for cheaper than the one-dose treatment Dura-Lube product. Keep in mind I don't have fuel economy in mind here, since the vehicle is anything but economical. I am, however, looking for something to extend the life of the pump and injectors maybe even function as a UCL.
I've been using MMO for a few days now and the pump does sound quieter. I listened to it before and after, and the after is toned down. Unless it's just the pump breaking in.
I'll attempt to do a burn test in a lab to see what pH value the ash comes out of for the MMO. And get my hands on some of that FP60 stuff I've heard so much about, but I can't find it locally. So I'll have to wait for it to ship.
Anyways thought I'd share this, be it not very interesting. Anyone ever mix MMO with 2-stroke oil? I wonder if that would add to the top end lube qualities?
