View Full Version : Range of Gas/Oil Mix Ratios for Old and New 2 Cycle Engines

02-01-2007, 05:10 PM
Anyone have an idea of the range of Mix Ratios Used in Old and New 2 Cycle Engines running today? I have Citgo oil bottle showing the ratios from 16:1 to 50:1, and I know the synthetic oils run at 100:1. 50:1 seems to be the standard ratio for newer engines, while 16:1 is might be a thing of the passed since the engines are so old and the oil is better today. The next lowest ratio I have is an email from Stihl saying if you don't use their brand oil to use 25:1, rather than 50:1 . Echo claims you can use 50:1 in all engines using their brand oil.

02-01-2007, 05:21 PM
Stihl & Redmax are set @ 50:1

02-01-2007, 05:24 PM
I put 50:1 in everything.... Including my mowers, maybe thats why they don't run so well????:confused: :confused:

02-06-2007, 01:19 AM
I've been using mixed fuel in my mowers since 1983. It seems to work ok.