Sorry, guys----I'm new to the rotary game and keep trying to decipher some of the abbreviations you use, e.g., OMP refers to...???       Paul
  ----- Original Message -----   From: Tracy Crook   To: Rotary motors in aircraft   Sent: Wednesday, March 26, 2008 3:22 PM
  Subject: [FlyRotary] Re: 2-stroke oil


  For the premix oil I use any good BIA cert. TCW-3 2-stroke oil mixed 50-50 with MMO  both of which come from Walmart.  Any of the Redline 2-stroke oils would be excellent, including the snomobile stuff.

  Let us know if you notice any change when you go to premix.  My old 1988 RX-7 felt spunkier when I started using premix in it but it was an old 150K mile beater.

  The bottle says Mobile 1 is compatible with standard mineral oil so I'm sure a bit of the old stuff in the system won't hurt.    Ignore my rantings on big oil pans and go flying :>)

  Tracy


  On Wed, Mar 26, 2008 at 11:09 AM, Al Gietzen <ALVentures@cox.net> wrote:

      I go for the 15W - 50 Mobile 1 cause it has more Zinc for the gears & bearings than the lighter weights.  Straight 40W  Redline would be even better but I can't get it at Walmart and I'm cheap.

    Tracy;

    What 2-stroke oil do you use, and can you get it at Walmart?  I note that Redline has a number of different 2-stroke oils, the gallon size for snowmobiles being the least expensive.  Would that work?



      BTW, I use a 4 qt sump even on the 20B.  I don't understand the appeal of great big oil pans.  Why carry all that extra weight

      The bigger pans make sense if you are using the OMP from the pan.  I made my custom pan at 8-quarts for that reason; but when I go to premix I'll probably carry 5-6.  My 'low oil' light comes on below about 4 quarts.

      BTW; is there an issue with a bit of mineral based oil mixed in with the synthetic?  When I drain the oil there is still about ½ quart in the oil cooler, and I'm sure some in other lines and other places.

      Al