MARVEL MYSTER OIL

[grumpyvette]

MARVEL MYSTER OIL is a good high detergent oil designed to aid valve train and rings ETC. cleaning, I almost always add about 10% marvel mstery oil to my engines, but if your running flat tappet lifters Id point out that many current oils are designed for roller lifter engines so Id sellect an oil thats designed for the older design with the higher zinc content, and adding a can of E.O.S. to the oil and moly assembly lube on the lifters and cam, sure won,t hurt on that first break in, if your breaking in the engine in your driveway, have a running hose and a fan handy, water running thru the radiators cooling fins and a fan blowing air helps prevent over heating, have a timing light and USE IT, check your fluid levels and watch your gauges

GM’S RECOMMENDED CRATE ENGINE START-UP PROCEDURE
Print this page out and check off boxes below (in the printed copy) when each step is completed.
Step Box
1) Safety first! If the car is on the ground, be sure the emergency brake is set, the wheels are chocked, and the transmission cannot fall into gear. Next verify that all hoses are tight and that both the radiator and radiator over flow jar/tank are full and have been filled with the proper anti-freeze and water mix.
2) Before starting your engine for the first time, add one pint of engine oil supplement ( EOS¹) to the crankcase oil and then check the oil level. Once this has been done, prime the oil system with an oil pump primer tool. Make sure number 1 cylinder is on TDC compression stroke, and install the distributor.
3) Adjust the distributor timing roughly by hand for a quick start up and smoothest idle possible.
4) When the engine first starts, verify that the engine rpm is at a safe level and that the timing is set near or at 30° before top dead center (BTDC). Run the engine speed between 1,500 and 2,500 RPM’s, varying the engine speed up and down with-in this range, to prevent overheating of the exhaust valves and the exhaust system. This should be done with no-load on the engine and for the first 30 minutes of operation.
5) After the first 30 minutes of the engine running, set the ignition timing according to the timing specifications. Now would be a good time to check thoroughly for leaks.
6) Adjust the carburetor settings, if necessary.
7) Drive the vehicle with varying speeds and loads on the engine for the first 30 miles. Be sure not to use a lot of throttle or high RPM.
8) Run five or six medium-throttle accelerations to about 3,800 RPM (55 to 60 MPH), then letting off in gear and coasting back down to 20 MPH.
9) Run a couple hard-throttle accelerations up to about 3,800 RPM (55 to 60 MPH), then letting off in gear and coasting back down to 20 MPH.
10) Change the oil and filter with recommended oil (10w30SG in most cases) and filter.
11) Drive the next 500 miles normally, without high RPM’s (below 3,800 RPM), hard use, or extended periods of high loading.
12) Change oil and filter again.
13) Your engine is now ready for many happy cruising miles!
Note¹: EOS P/N 1052367 can be used any time during the life of the engine.
Technical Note: This procedure has been corrected and improved from the original GMPP procedure by GILBERT CHEVROLET.




a few similar/useful threads/info

http://www.marvelmysteryoil.com/main.taf?p=2,1

http://www.digitalcorvettes.com/forums/showthread.php?t=80832

http://www.digitalcorvettes.com/forums/showthread.php?t=80937

http://www.digitalcorvettes.com/forums/showthread.php?t=80790

 

[grumpyvette]

Re: MARVEL MYSTERY OIL

If youve got an older engine with a good deal of sludge from less than ideal maintenance..and if the engine RUNS throw two quarts of marvel mystery oil into the engine and let it run for a few hours and change the oil and oil filter, do that several times, adding two quarts of marvel mystery oil in place of two qts of the regular oil,and changing the oil and filter after a few days then, you'll find most of the crud dissolved
Ive almost always used about 90% of a good brand of synthetic oil and 10% marvel mystery oil in my engines for MANY years, I generally change both the oil and oil filters in the 3500-5000 mile range and they always come apart during inspections looking like new, what many guys don,t realize is that M.M.O. is just a high quality light oil with a high percentage of solvents and detergents, its not an oil additive in the common sense of the word, just an oil that tends to dissolve crud effectively

marvel mystery oil has lots of solvents and detergents in it, resulting in an oil filter that quickly fills up with the freed up crud as it breaks free! so use cheaper , standard oil , mixed with the MMO,as its only going to be in the engine a few days to carry crud to the oil filter

youll be amazed at the amount of crud that breaks free and how fast the oil turns into slime as the sludge gets taken into solution by the deterbgent oil mix, oils with high parifin content are especially prone to building sludge if the engines not seen frequent oil changes and long drives as short hops don,t build the heat necessary to get the crud dissolved