Stihl Mix History Question

It seems to me that the above saws use a 40:1 mix like the old McCulloch"s did, but I notice that newer Stihl saws use 50:1 mix.

Anyone remember Stihl saws (even the ones above) using a 40:1 mix?

Thanks!
Bill

Two things have changed. #1 the EPA regs calling for less oil-smoke, and #2 the quality of two-stroke-cycle engine oil. Back in the 60s, even early 70s, conventional 30 W engine oil was often used for the mix (and allowed) instead of any TCW rated special oil.

The richer you can make your mix, the better it is for your saw up to the point you start fouling exhaust ports and spark-plugs. I've been using 25 to 1 since the late 60s and I still have a few Stihls that were built then (and O40, 030, and S10). I've never had an exhaust port fould on any of my Stihls.

Can't say the same for some of my old Homelites run at 16 to 1.

Here's what the 1969 Stihl owner's manual says. If using SAE 30 engine oil, mix at a ratio of 25 to 1. If using special two-stroke engine oil, 40 to 1 is sufficient.

I posted my situation here a couple of weeks ago - I'm still weighing options - a lot depends on how BAD my old 028 puked.

The local dealer said $400 for OPENERS - IF the crank is still OK. According to him, what usually happens is one of the crank bearings slings a needle or the cage. I talked to the guy I bought it from about 30 years ago and he said he could replace the cylinder & piston for about $225. He's not a Stihl dealer anymore but he still has a rental shop. It's all gonna be determined when they open it. If the crankshaft & other stuff is trashed, too I guess if it's not cost effective, he'll have a "carcass" to strip for parts. It'll be a sad end for an old friend!

I think I'll let the guy I bought it from check it first. He's 4 states away now but it may be worth it. He's never steered me wrong yet. I've said in other posts that my eyes and fingers just don't work on stuff that small anymore so it�s gotta go to a real shop.

A new 260 Pro is about $500. A new 280 is about $450. A new Husky 460 is $410. Both dealers are local.

I'm going to check the local Dalmar dealer when they open after the CHRISTmas Holidays, too. I've never even seen one of them but it sounds like they're pretty good, too.

It's looking more and more like repairing my old 028 won't be cost effective - but I'm gonna try to save it. (Yeah � I try to find homes for stray dogs and cat, too!) If I can't, it'll be kinda like having to "put down" my dog!

I'm leaning hard toward the 260 Pro - I'll be glad to get any input!

Ya'll have a very merry CHRISTmas!