The difference in the standard is the content of lead, the specified value of the lead content of AVG 100 LL is lower than AVG 100. Next there is a difference in color, 100 is colored in the green, while 100 LLL is blue. This is artificially colored to avoid confusion of oil type, so it does not matter to performance. The lead content of AVG 100 in Japan has cleared the specified value of AVG 100 LL. It meets anti-knocking property with minimum lead content. ※ Those with current domestic handling are Avgas 100 LL.