moon discs

I see a company called speedway motors has some 15 " moon discs they call them in the hotrod world has anyone tried them and seen any gains in MPG I thought I had seen another company or person called mikes that sells them but have been unable to find the link .

 

Thanks for the reply the discs I bought were from CHROME WAREHOUSE $70.00 for the set of 4 fitted them yesterday so will see what my trip is after a month with them on .

 

1 week and so far a + improvement

 

will try my phone as my Nikon just took a dump

 

sorry its a poor pic my flip phone

 

so after 1500 miles here is what I found my trip to town is 27 miles 2 of which are off road
usually I use the ODO reading for mileage which shows the" from start" mpg,
at each end of the journey it would show 62/64 mpg which would turn out to be 60/61 actual mpg this was at a CC of 45MPH as its a very quiet highway there was no risk to other users I used CC to remove a variable from the figures ,after fitting the discs my ODO readings would show 67/69 mpg and this turned out to be an actual MPG of 64/65mpg in fill ups so not a huge increase as mentioned by other user here but interesting ,I stopped the test due to much colder weather now and also I lost a disc in an off road traffic accident avoidance maneuver, I am going to try this test again @55 mph when I get a replacement disc .

 

I don't have any steep downhills on my trip and I use regen to slow down so no brake problems