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Maybe so, but nit has none of that stuff in it. The oxygenated in the form of ethanol is blended at the terminal to 10%. Ether was banned by the epa, nitro..no way..etc.

What you describe is common. Some time it's just streaks of oil/fuel and sometimes it's just superficial marks on the plating.

That guy is full of it.

Welding fumes must have cooked your brain.

They dont. For starters the additive treat rates are mostly very low and off the 5 or so refiners add they are mostly corrosion inhibitors and anti oxidents. And this is done to keep refinery equipment from having issues. Some station brands like Chevron will add some additional detergent...

Spectrum is a subsidiary of P66. Omni is a packaging outfit.

No, Castrol makes Stihl for Canada and other countries. They have nothing to do with Stihl oil in the US.

Just admit. Your full of crap.

Back in the day I remember alamia.com selling them for $350. A Ms260 at the time was something like $450.

In plain English your basing your opinion on feelings and not facts. Let's talk facts. The piston speeds are safe and with no load the engine will not be lean/hot, so what's going to damage the motor?

Uses your eyes and Google up some picture evidence. No other MFG says runninga 1980's quality oil is reccomended. That and it's ridiculously expensive given it's low quality.

It's a FB oil which is a early 80's quality level. In addition it's an ashless oil, like a boat oil and works poor in air cooled two strokes.

Yes, and Komatsu was the parent company, so they had deep pockets to market them, but never did. They make excellent stuff and even built a trimmer for Stihl years ago.

In other words don't let your facts get in the way of my superstitions. And FWIW it's inertia that kills reciprocating motors. IE the piston and con rod acceleration and deceleration. This is commonly assessed by calculating piston speed.

This. Ultra is good and was designed for 4mix engines. It's terrible in a 2 stroke engine.

Piston speeds are different bearing types are different, ring designs different, etc, etc. Two stroke Karts will spin up to 20k rpm easily, 125 shifters 18k while loaded. And here we are worried about a unloaded low output chainsaw going poof when reved out to 14k UNLOADED..

Totally different engines.

It's just not an issue..

I have had that problem with Lawnboy Dura force motors which have week coils from the get go. Typically I set with business card, but for LB I use a feeler gauge.

Stihl may be pushing the envelope with the FI 500I, but the rest of the line up was copied essentially from Husky. Keep in mind Husky had air injection, spring AV 4 transfer port cylinders a generation before Stihl. They also had the first strato charged and solenoid controlled carb. They...