Ultra was a quick fix to Stihl's 4- Mix engine oil delima . Not a great oil in numerous chain saw application's ! Ultra HP is a better overall product .I have two botles of ultra on a, shelve...waiting to finish a botle of motul 800 and Ipone Samurai racing
It's still is a legal certification for a rudimentary oil specification as listed . However it has been vastly superseded within the design perimeters of today's oils quality specifications within various applications . It's like comparing a Model T to a Ferrari within Oil Performance Standards ! Obsolete Defined : " Out of date , less developed , rudimentary ! " No longer used , replaced with something new ! " Pretty clear to me !
Why is shell inferior for chainsaw use? Low cst of 7.x (almost sae20 oil)?
Its a bad choice for the exact reasons you have listed . It has also apparently given numerous individuals extreme headaches & eye & lung irritation during usage in chainsaws . It has caused engine damage in numerous chainsaw applications do to carbon fouling and overheating in recommended manufacturer oil ratio's . Like any oil , if mixed properly , in conjunction with proper carb tuning to application , satisfactory results are possible !
What really requires marine engines and lawnboys to run ashless oil is the fact they run more or less constant throttle. This constant throttle operation causes mettalic ash build up on the head and piston, which grounds out spark plugs and can cause pre ignition.
Marketing. I want to say it's been obsolete for over 30 years.
Low flash point doesn't mean the oil combustion easier and not by a long shot.They are definitely superb oils....BUT!
I am not a professional logger....more like occasional/seasonal user...so my saws an (s)trimmer dont get much use...and even when they do....I am not nearly using them on their limits...
So...for me....Motul 800 smokes too much @32:1...and leaves goo in mufflers...
Ipone....said it has pleasant strawberry scent....well....it smells more like burnt plastic
I am looking after Shell ultra....like his (on paper) low burning point (that at least in teory means clean exhaust)....
If you are not advanced/hard user....always try to focus on sythetic oils with low burning points!
Another example of good oil would be Motul 2t 710 (or Motul Scooter Power....I think that is the same oil under different label!)
He's talking about Shell Ultra, not Stihl Ultra.
I agree , good further points of consideration within TD oils & lawnboy products Mr Walker !
Actually I dont know exactly wether Broken described Stihl Ultra or Shell ultra in his text
#581 he grouped Ultra with Motul 800 & spong @ 32:1 ...etc. Then again mentioned the foul smell & cyl. , head deposits re: Stihl Ultra , so I replied accordingly . As far as Shell 2T oil are very good products when used appropriately . My son still uses Shell 2T oils religiously , good pricing as you previously indicated with Mystik/ Citgo products !
Stihl Ultra bad ! Shell Ultra good ! Tarzan said !Actually I dont know exactly wether Broke described Stihl Ultra or Shell ultra in his text
GREAT !
I haven't seen Shell Ultra since I lived in Canada. It's just not available here, but has a good reputation in your neighborhood.
Similar to Citco oil reputation you mentioned earlier b , all around serviceable product @ a fair price , I believe their Shell Advanced Ultra 2T is the oil my Son use in his sleds one is a 503 air cooled Rotax twin in a Skandic fishing sled . The other is a 800 Polaris liquid cooled twin RMK mountain sled with power valves . Nice and clean in both units 8 yrs running .
Buy a product that is designed for your application & mix & tune accordingly !
