Whatever you cut and paste from Sunoco is fine, but the fact still remains that not all gasoline deteriorates in octane value with storage. It all has to do with how the apparent value is obtained.
No it has to do with the chemicals blended in to pump gas and they all use volatile gases to obtain their blends and they vary it with the season and in some cases with the region. My excerpt was from Sunoco but you can find similar publications and results from all the major brands of automotive pump gas. Now if you are using Av gas or some special unobtainium fuel as your basis then it does not answer the OP's question.Whatever you cut and paste from Sunoco is fine, but the fact still remains that not all gasoline deteriorates in octane value with storage. It all has to do with how the apparent value is obtained.
And why is that? Compression ratio is not impacted by engine RPM. I run Tru-Fuel premixed 50:1 in all of my Stihl equipment. Am I missing something here?It matters only in high revolving two stroke equipement (ie husqvarna xp....stihl pro range etc)
Running higher octane fuel in small 2 stroke engines is important only because they cannot tolerate preignition. Even if they can run on an 87 or 89 just fine the higher octane give you a cushion incase the fuel has started to degrade or run lean. They are so sensitive that Stihl and Echo will deny warranty coverage if they see any sign of preignition. I dont remember if it was stihl or echo that would double their warranty coverage if you bought their engineered fuel when buying their chainsaw or string trimmer.
2 stroke timing is changed via adjusting the squish and height of the transfer ports in the cylinder - and of course correspondingly moving the ignition coil pickup to match.What causes pre-ignition? Doubt you can advance the timing etc on these small engines?
What does that get you?
What’s expensive???Really expensive 2 stroke fuel...???
Just my $0.02
What does it get you?What’s expensive???
I run that TF can gas … my Stihl is my last 2 stroke anything so it’s worth it to me. Also grabbed a 15 amp electric last year that saves wear on the Stihl and my ears …And why is that? Compression ratio is not impacted by engine RPM. I run Tru-Fuel premixed 50:1 in all of my Stihl equipment. Am I missing something here?