I just got a lawnmower from the people I work for and it is a 30 year old Jacobsen with a 16? hp engine welded to the frame and it cuts 5ft and higher grass down like you wouldn’t believe and makes it look like a golf course in the first round. But I bought the SUPER PREMIUM Gas for it, a bottle of MMO, a bottle of Motor Honey oil treatment, and Penzoil 10w30 to get the engine cleaned out very good, but my question is that with the Super Premium gas i was wondering if the MMO would be able to mix with it, even though it is clean enough, so I can make it really clean out the engine. I will also be changing the oil and adding MMO with that and the second time I change it I will be adding the Motor Honey Oil Treatment.

Marvel Mystery Oil will mix with all grades of gasoline including Super Premium.  Even the Super Premium may contain up to 10 % ethanol which is good for the tail pipe emissions but reduces the lubricity of the gasoline.  Using Marvel Myster Oil add back in the lost lubricity and keeps the entire fuel system free of sludge, varnish and carbon deposits.

Motor Oil Honey is a viscosity improver and increases the viscosity of the oil.  It does nothing to keep the crankcase clean.

Motor Honey and STP are very similar, they make oil thick, and in an oil burner might be useful.  I’d skip the Motor Honey and add some MMO to the oil to clean things up. 

AD

Yes, I agree with ADFD1. If you need a thicker oil to help control burning, just use a higher viscosity oil to start with. It’s cheaper that way and you have less risk of messing with the additive package of the original oil.