National Aeronca Association Bulletin Board

aeroncafan · Post by **aeroncafan** » Thu Oct 23, 2008 22:10

mikeberg/wi wrote:Guess I can't understand why he wouldn't run 20-50 all year long, but one things I've figured out over the years is that nothing seperates any two mechanic's thinking like engine oil. My AI says Phillips 20/50 is not good . He likes Aero Shell. I've used Phillips 20-50 for over 25 years in both my 65's and my Cherokee 140 with zero problems. Of course, he doesn't like auto fuel either.

Go figure................... .

Mike Berg

To save a few $$ during the warmer months maybe? Staight weight is a bit cheaper. Regardless of the camp you fall in, just make sure you keep it clean!

flyingfool · Post by **flyingfool** » Fri Oct 24, 2008 11:25

I am in the process of seating new rings on my left two cylinders. I have about 20 hours on the straight mineral weight oil. I'm thinking about going with straight mineral weight oil for the next oil change interval as well. This would put 50 hours on mineral oil.

Would it make sense for me to use MMO in the oil for the last 5 hours of that 2nd interval so prior to switching to the Phillips 20W50 AD oil?

SFC Hiatt · Post by **SFC Hiatt** » Fri Oct 24, 2008 17:52

I don't know much but, from what I have read don't be afraid to push the crap out of the engine during breakin. Not a problem for me

mike newall · Post by **mike newall** » Sat Oct 25, 2008 00:24

Had a very interesting chat with Tim Morland from ECI today at Copperstate.

I had always believed that break in should be on straight mineral oil, no dispersent. I may be changing my mind after his explaination of how the oil works.

The ashless dispersant oils - W80/W100 do not have detergents in them, but agents that hold non soluble contaminants - crap - in suspension until a screen or a filter can remove them.

So, that means you can run dispersant oil, but not synthetic oils.

Interesting !

MikeB · Post by **MikeB** » Sat Oct 25, 2008 08:56

If I remember correctly ECI recommends Phillips 20-50 XC for breakin. I just bought three case for the airport and the price was over $50 per case of 12. I can remember paying around $20 a few years ago.

Mike Berg

Jody Wittmeyer · Post by **Jody Wittmeyer** » Sat Oct 25, 2008 15:03

We just got some and it's over $8 a quart. Big price jump.

MikeB · Post by **MikeB** » Sat Oct 25, 2008 16:54

Guess I shouldn't complain at around $4 a quart. On the other hand, gas is down to around $2.39 for regular unleaded and someone told me this morning that 100LL is being sold for less than $4 gallon in Minnesota. Don't expect that will happen at our local FBO. They should wear a mask when they take your credit card.

Mike Berg

Captgrumps · Post by **Captgrumps** » Sat Oct 25, 2008 19:44

Av gas is $3.90 self serve at our main fill up place now--$4.05 full service.

Doug