I have a 10hp westbeke diesel engine. I was talking to a member at my boat club and he said, I should use mystery oil with my engine and transmission oil. I don't know anything about this oil. I went on their web site and they said it is the greatest lubricant in the world and beyond. I really didn't expect them to say anything else. What I am looking for is a honest answer. Should I use it and at what %? SBO are Great! Thanks.
Mystery Oil
- Thread starter mavourneen
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that oil is very good ...its sorta like your unwanted inlaw ..it will show up in places you never thought it could go...as far as useing it in the mix of your normal oil ...there is pro and con.....i personally havent used it in the oil as a additive...but i did use it to flush out a water soked block before starting a other wise dead yanmar and it served me well at that point......others on here with more experiance than i will be able to tell you more......
regards
woody
regards
woody
MMO is mostly a mix of petroleum solvents and light weight oil.
Ive been using it for many years to:
• 'Top-oil' gasoline engines .... 4oz.per 10 gal. of gasoline to keep the upper cylinder walls lubricated for LESS wear and retard development of 'cylinder taper'.
• To help in restoring Compression Pressure Values .... it helps loosen carbon deposits in and behind the piston ring grooves and helps to release 'sticky' piston rings. pour in a few oz. per cylinder, let sit a few days, suck out for increased compression when the rings are 'sticking'.
• Reconditioning engines that have sat for very long times and for 'releasing' engines that have 'frozen' due to internal rust. Fill oil crankcase with 100% MMO, pour in a few oz. per cylinder, and let sit, attempt to turn engine by hand to insure piston rings havent 'rust frozen' to cylinder walls and piston grooves. When 'free', spin engine with starter, let sit. Start engine with NO LOAD at low rpm until warm, let sit. Remove half of MMO and add half oil. Run with increasing load to polish the cylinder walls, etc. Remove half the mix and back to fill with reg. oil and run until next oil change to finish 'polishing'. Should be done to any engine that has been 'submerged'.
• Used to use it at 25:75 MMO/non-detergent oil for better/faster 'break-in' polishing when rebuilding, especially racing engines, etc.
With modern 'sensor controlled' engines it can foul such sensors ... there is a 'work-around' by using 'pre-chamber' mounts for the sensors but I wont discuss for obvious reasons; but, allows such altered engines to pass EPA testing when 'emission probe' / exhaust gas testing.
Ive been using it for many years to:
• 'Top-oil' gasoline engines .... 4oz.per 10 gal. of gasoline to keep the upper cylinder walls lubricated for LESS wear and retard development of 'cylinder taper'.
• To help in restoring Compression Pressure Values .... it helps loosen carbon deposits in and behind the piston ring grooves and helps to release 'sticky' piston rings. pour in a few oz. per cylinder, let sit a few days, suck out for increased compression when the rings are 'sticking'.
• Reconditioning engines that have sat for very long times and for 'releasing' engines that have 'frozen' due to internal rust. Fill oil crankcase with 100% MMO, pour in a few oz. per cylinder, and let sit, attempt to turn engine by hand to insure piston rings havent 'rust frozen' to cylinder walls and piston grooves. When 'free', spin engine with starter, let sit. Start engine with NO LOAD at low rpm until warm, let sit. Remove half of MMO and add half oil. Run with increasing load to polish the cylinder walls, etc. Remove half the mix and back to fill with reg. oil and run until next oil change to finish 'polishing'. Should be done to any engine that has been 'submerged'.
• Used to use it at 25:75 MMO/non-detergent oil for better/faster 'break-in' polishing when rebuilding, especially racing engines, etc.
With modern 'sensor controlled' engines it can foul such sensors ... there is a 'work-around' by using 'pre-chamber' mounts for the sensors but I wont discuss for obvious reasons; but, allows such altered engines to pass EPA testing when 'emission probe' / exhaust gas testing.
The Mystery about oil to me is why people don't read and follow the manufacturers recommendations. I've not read an owners manual yet that recommends this stuff, and it's been around for many years. I'm pretty sure the engineers that designed these engines knew what the lubrication requirements where for their design specifications.
I'm convinced that the same crowd that use oil additives are the same ones that don't believe the wet paint sign, and touch the surface to see if it's true or not.
When all else fails, read the instructions... JMHO
I'm convinced that the same crowd that use oil additives are the same ones that don't believe the wet paint sign, and touch the surface to see if it's true or not.
When all else fails, read the instructions... JMHO
I've used it to loosen up frozen engines. its thin like ATF.
some have used ATF when MMO wasn't available.
Not sure I'd add it to the oil, unless you want to loosen up some gunk. then change your oil and filters after it gets hot. might need to do that a few times... but cleaning out the gunk in an old engine can cause more oil burning after running a cleaner type treatment... so check your oil use carefully after using this or similar cleaning type oil additives.
some have used ATF when MMO wasn't available.
Not sure I'd add it to the oil, unless you want to loosen up some gunk. then change your oil and filters after it gets hot. might need to do that a few times... but cleaning out the gunk in an old engine can cause more oil burning after running a cleaner type treatment... so check your oil use carefully after using this or similar cleaning type oil additives.
Mechanics have been using Marvel Mystery Oil in engines for many years. Some recommend it in place of more expensive prestart oil injection systems. It will coat inside parts of the engine and not run off and allow them to dry out as standard oil may do. Our engine guru, Bob Smith, the chief engineer for the Ford Lehman engine recommends it to be added to every tank of diesel rather than any other diesel additive. So there is support for the product and it has been around for a lot of years, The longevity of the Company and product says that someone is using it and there seems to be no reports of ill affects when added to the engine or the fuel. We used it for 12 years in our Perkins and I can't say if it helped keep the engine in top shape for as long as we owned it or not. We do add it to every tank of fuel in our trawler as Bob Recommends. Chuck
Back in the 50's and 60's Judson Supercharger required the use of Marvel Mystery oil in the vacuum draw oiler for their supercharger. Glass bottle with a metal head with a sight glass drip viewer. You would set the drip rate when you checked oil, about 20 times a day on my MG A. Mine was mounted where the heater would have been if I had had one. I keep a can around because I like the can and the smell of it. I also use it in my own penetrant. Bou not in my diesels. Never thought to put it in.
Just finished a 4 day diesel class in Annapolis and they showed a chart of various additives and the engine wear effect over time with each. MMO was worse than plain oil. Have never used it myself - just know what was on the chart. They recommended no additives, just keep changing it at mileage recommended by manufacturer and ALWAYS at the end of the season so you do not leave it layed up with dirty oil in it.
MMO has been a respectable fuel additive for many
years. I've never heard of one reputable mechanic recommend it as an oil additive however. Modern crankcase oils come with a precise additive package that can be damaged by introducing an outside additive. The only time that I used MMO was as a fuel additive in a marine gasoline engine and it seemed to work well for that.
years. I've never heard of one reputable mechanic recommend it as an oil additive however. Modern crankcase oils come with a precise additive package that can be damaged by introducing an outside additive. The only time that I used MMO was as a fuel additive in a marine gasoline engine and it seemed to work well for that.
Don Moyer from Moyer Marine, the number one source for Atomic 4 engines, recommends MMO in the oil for any engines that have carbon and sludge in the crankcase. Many auto mechanics will recommend it for gas engines that have sticky valves and a host of other issues. Being in the service end of the marine industry for a lot of years I have talked with many mechanics that recommend it in oil and fuel. Most will recommend it in the oil for maintenance and not for continued use. The age of the engine also plays a part in whether it should be used or not. The original poster ask about the Westerbeke but doesn't say how old the engine is or the number of hours. One quart at the oil change might be beneficial to the engine then perhaps every 500 hours and regular use in the fuel tank at 4 0z. per 10 gallons, as we use in our tanks for our Ford Lehman. Chuck
It's my opinion that the engine won't be harmed by using MMO, so giving it a try, it might help in some way. Especially if the engines past maintenance is unknown or the engine has sat for prolonged periods. But we all know what opinions are like. Good luck. Chuck
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