View Full Version : mac engine oil ratio
05-26-2004, 12:42 AM
for a friend who restore an ultralight gyro:
what is the normal oil-gas ratio for a 90hp engine with regular oil and synthetic oil?
05-26-2004, 10:26 AM
14oz of oil to 5 gallon 100ll fuel. If you can use "Blue marble oil". :D
05-26-2004, 03:18 PM
Mineral oil aviation nondetergent 1 quart to 6 galons
amsoil 8 oz to 5 gallons
spectro"sinthetic blend 13 oz to 5 gallons
Pensoil 13 oz to 5 gallons.
After first 5 gallons are burned then check plugs and fine tune base on color of spark plugs.
05-26-2004, 04:43 PM
Run no oil, That way one of your problems will be solved quicker. (LOL)
05-26-2004, 04:46 PM
philvsr : The oil radio that I toll you was the one that "Mr Gadged" recommend me on a already broke in engine. But Chuck "Caribean_gyro" you can take his advise to . He knows alote about that engine. :D
05-26-2004, 08:09 PM
The Mac engine will require 16- oz of Kendall oil to 5 gal of 100 LL. If you want your Mac to run a long time you should use BLUE MARBLE OIL at 14- oz to 5 gal 100LL.I have tried all sorts of oil for the Mac & have found that the BLUE MARBLE with give the best performance hands down! :)
05-26-2004, 09:36 PM
Hi Philippe. Glad you found your way over here.
05-26-2004, 11:04 PM
Thanks for all replies...
I did'nt speak about myself:
I own Gardan Minicab F-PRAZ and I win my money as a A320 captain....
05-27-2004, 01:06 AM
Just use para -synthetic oil. Or commonly know synthetic blend You wont regret it.
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