Extreme Flight Owners Thread

[ryan_m]

Some used to say to always breakin using a non synthetic oil, like lawn boy ashlesss, but others say to use redline all the way. I think it just extends the break in process by using redline and making it take 3-4 gallons instead of 1-2, so I expect I'll deal with it a while longer (the oily black mess). It's quite thick though, so I think I'll swap to 40:1 also.

 

[skibum44]

Makes sense, DA said to use redline 40:1 all the way.

 

[Ohio AV8TOR]

Black mess - oj joy! I had that through two VVRC 40 motors and now it looks like I will have it on my new 70 too, maybe worse.

 

[dth7]

We've been using a combination of Penzoil Dino and Stihl ultra up here. 40:1 +\- and I haven't seen or heard of a big soot problem.

 

[Enterprise]

My 70 runs on 40:1 stihl and it was making black soot all season. The twin burns more fuel and is less efficient for the air mass moved through it so that is probably the issue. The VVRC-40 is a bit messy as well and the PTE-72 was as bad as a glow plane.

 

[dribar]

I'm at 2 gal on engine #1 and still pretty black using redline. But boy does she purrrrrr

 

[skibum44]

It sure does, trying the 24x10TH tomorrow.

 

[Ohio AV8TOR]

So is the black Redline related or the DA-70 related? I ask because I started using Redline with my VVRC 40 and it was pretty black. My DA-60 was not to bad but I used Stihl HP with it and I bought it used from DA.

 

[3dNater]

It has to do with an engine that has not finished breaking in.

 

[RKEstes]

Yeah both my DA70 And VVRC40 are well broken in now and almost zero black residue anymore.