Also, Shell 93 is not ethanol free around Cincy. As others have said I believe you tuned your way to this situation or tried to tune away from an already ongoing air/vac leak. It is ideal for air-cooled two-stroke and 4-MIX engines with a mix lubrication system, with or without a catalytic converter. It is ideal for use in STIHL … However all three motors suddenly developing air leaks at the same time is unlikely. That prevents calcium and sodium sulphate ash occurring as combustion products. In the long run, something was causing the engine to run hot, and I was most likely doing is making the engine run leaner. ANDREAS STIHL AG & Co. KG, D-71336 Waiblingen. Double limited warranty special! I usually run Sthil ultra (blue-green), I have run stihl regular (red), I could tell the difference straightaway there seemed to be a lot more smoke coming out with the red than ultra Stihl ( blue-green). Synthetic has been around as long as many of them it is no knew concept. Less worry. Sign Up. That's why they are a top brand. I wish we could. Either way I assure you it was not the Ultra. http://pods.dasnr.okstate.edu/docushare/dsweb/Get/Document-6015/BAE-1746pod.pdf, http://www.epa.gov/oms/regs/fuels/rfg/waterphs.pdf. I mix it 50:1 and have had no problems due to gas. I use ultra in new and old saws, no problemo. Sign up for our newsletter to hear about offers, tips and upcoming events. All of these saws have either been completely rebuilt or at least all apart and cleaned internally so they have started off clean inside and ultra keeps then that way. The efficiency and life of STIHL high-performance machines is partly determined by the quality of the engine oil. Regarding mix oils again,I was reading another thread and the comment that Eyolf made (Thread is "Black fuel showed up again"), he discovered someone is routinely using old black crankcase oil for mix oil at 20-1 in all his equipment and outboard motor too,read it if you need a good laugh! Everyone will have a preference. Best motor oil money can buy. It may not display this or other websites correctly. Ultra isn't designed for older machines. But I too have heard that any mix with ethanol gas in it should be used with a 1 month time frame. Don't miss out. This video is about 2-stroke oil for landscaping equipment. STIHL HP Ultra Oil and STIHL MotoMix® premixed fuel provide for improved engine longevity. What about mix that has ethanol gas in it. Then bought a 6 pack of Stihl HP Ultra, 1 gal next and just bought my second gallon. The strong green colour makes it easy to see the progress of mixing. I am independent AMSOIL dealer. They test the saw's, and oil constantly. STIHL HP Ultra is also very environmentally-friendly, low in sulphur and biodegradable - more than 80 per cent in 21 days. Oil is not the problem. You can't buy ethanol free pump gas around here period. I was say any reputable synthetic toadya is the best thing going. The constant high efficiency of your high-performance engine is maintained for a very long time. It's a semi-synthetic blend of oil certified for use in all air-cooled, 2-stroke, outdoor power equipment engines, Stihl Ultra is a Full synthetic and a better oil than the Echo. Other restrictions apply. It is ideal for air-cooled two-stroke and 4-MIX engines with a mix lubrication system, with or without a catalytic converter. In addition to keeping your STIHL equipment … All on a Echo 225, PAS 225, 260 … Double Your Warranty Protection with the New STIHL Ultra Limited Warranty. I know that Stihl only requires 89, however, the dealer told me when I switched that 93 is better in 2-cycles. The modern oil is the outcome. I ask this only because some of my friends just do not have access to non-ethanol gas. Stihl's High Performance oil I believe is is there special blend oil … I have been using ultra with reg (89) pump gas in every saw in my sig with no ill effects.