Use good quality unleaded gasoline with a maximum of 10% ethanol contents.
We recommend that you use gasoline of a higher octane grade for work with continuously high rpm.
Recommended to use any of below:
SP 98
SP 95
SP 95 E 10.
CAUTION:
Do not use gasoline with an octane grade less than 90 RON/87 AKI. Use of a lower octane grade can cause engine knocking, which causes engine damages.