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2000 Subaru Outback
After my 1991 Subaru died, I purchased another Subaru (a 2000 Outback) with the same flat-4 engine. This time I had a \”brand new\” car to start with, so I was much better at tracking mileage. Each point on the graphs below represent a tank fillup. Mileage was calculated the standard way.
I drove the first 1200 miles with no modifications, and averaged 22MPG…
It was consistent it and a little better than the EPA\’s 21MPG combined estimate.
Then I installed a \”Cup-a-Joe\” (stainless measuring cups with about 1/8\” spacing) and drove almost 10,000 miles. Averaged 24.6MPG, an 11.5% increase over the 22MPG baseline. I noticed a fractal in the data (red lines) every 6th tank. Possibly related to oil changes? The green trendline seemed to be increasing over the 5 months.
Then I installed the moejoe cell. Drove 6,200 miles over 3 months and averaged 25.2MPG (14.5% increase). The trendline shows a \”bump\” in the first 2 weeks, then stays steady (actually declines a little).
Then I rebuilt my moejoe, installed a bismuth core and new spacers. Also added neo magnets facing north to the fuel line on 6/21/09 and a \”Hull Effect\” switch on 8/13/09 (red). Averaged 23.6MPG (7.2% increase).
I\’ve been unemployed since 2008, so my driving has reduced considerably (the previous \”run\” was over a year). I\’ve considered that sporadic driving could lessen the effect(?). It previously took 2 weeks to \”acclimatize\” the engine, but now, with reduced driving, the engine may be \”loosing it\’s charge\” when it\’s not driven regularly(?). Just a theory. I\’m curious what people think.
Performance seemed to be declining, so I pulled out the moejoe to rebuild it and drove for a while without it (still left the fuel line magnets & hull effect switch installed). I averaged 24.1MPG over 3,800 miles (6 months). Don\’t know what to make of the 29MPG spike surrounded by below average dips. Possibly a mistake recording my mileage or fuel consumption?
While the moejoe was removed. I polished it up on a lathe, reassembled it, and inserted a small tube to the center sphere. the concept was that when hooked to the car\’s vaccuum port, air would enter the small tube, bubble through the water, then through the transfer tube into the engine. I sealed the small tube, then added tiny pinholes to regulate the air intake so water didn\’t get sucked into the engine like a straw.
I reinstalled the new setup under the hood before I took a trip down south (9/30-10/4/2010). Again, the car seemed to respond during the trip, but slowly lost the effect when driving became less frequent. So far, I\’ve averaged 25.2MPG over 2,000 miles (14.5% increase).
I haven\’t made any changes to my EFI or O2 sensor. The only \”modification\” I can think of (other than adding the moejoe, magnets and H.E.) was that I introduced a small vacuum leak to provide some airflow through the transfer tube. This air was high humidity (being bubbled through charged water). This could be the reason why the engine ran leaner than the EFI was expecting and not a moejoe effect at all(?).
So that\’s where I\’m at. Three years of mileage history. Not sure what else to try. Maybe put the moejoe on my home furnace or a small generator that may get more use than my vehicle?
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