Hi John
MC-2st full synthetic is the best 2 stroke oil I have ever used.
I am on my 2nd bottle -bearing in mind I store machines dry so don't waste much through stale fuel - though I do keep 3 ratios; 25, 40 and 50. I get about 1-1.5 years from 1l bottle.
Its JASO FD which means low smoke and next to no ash/carbon build up.
My issue is 90% of my machinery comes pre-owned, yet I do have a few machines that I have had from new and only run on penrite MC-2st. One being a Victa VCE1640 chainsaw. Probably a couple hours use on it and internally there is not a spot of carbon on the piston crown.
I was surprised to see a reduction in exhaust carbon in a few Victa PT's after maybe 10 tanks mixed 25:1. Presumably the same goes for the carbon sticking in rings.
With regards to smoke, you are always going to get smoke on a cold start. Today I started a 1985 PT Commando - first time since march. 2 pulls in a small cloud of smoke which cleared up in 15 seconds. After this, there is zero 2 stroke smoke at all. Pretty hard to foul a plug either - you can idle for 1/2 an hour and not do it.
I also do no pre-storage prep - they go straight in the shed. The good thing is, this oil doesn't wash off the bore and settle once it sits for a month or more - you can pull the head off and its still nice and oiled all round.
There is no doubt other good oils. Husqvarna LS+ is jaso FD , but only semi synthetic. Though an anecdote; a friend bought a new 129lk trimmer (husky split shaft, around $450)
He put it on a piece of cardboard with a full tank and did as I instructed him - to let it warm up for 5 minutes prior to first use. Anyhow, he got a phone call, sat for 5 minutes, put phone down and fell asleep on the lounge. Wife gets home an hour or 2 later, wakes him and told him his new trimmer just stalled.
Didn't foul a plug - it ran out of fuel
1 full tank at idle - probably good oil (and a good engine no doubt)
Regards
