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roenidoc · 12-09-2021, 08:08 PM

Hi crankster,
the Marvel oiler operates inverse to vacuum - high vacuum closes the clearance between the needle & seat, and delivers "less oil". When vacuum drops, when under load, the clearance increases delivering more oil.

The Ampco does not have this feature, so when vacuum drops it delivers a bit less oil than when vacuum is high.

So, one can nearly say, the Ampco oiler is nearly only half as effektive as the Marvel Mystery Oiler.

12-09-2021, 08:08 PM	#23
roenidoc Junior Member Join Date: Aug 2019 Location: village in low mountain range 40 miles east of cologne Posts: 9	Re: Marvel Mystery Oiler Hi crankster, the Marvel oiler operates inverse to vacuum - high vacuum closes the clearance between the needle & seat, and delivers "less oil". When vacuum drops, when under load, the clearance increases delivering more oil. The Ampco does not have this feature, so when vacuum drops it delivers a bit less oil than when vacuum is high. So, one can nearly say, the Ampco oiler is nearly only half as effektive as the Marvel Mystery Oiler.