Cleaning effect by Shell Pura100

As an experiment Shell Pura 100 fuel is now in the fuel tank of VW 1302 Super Beetle with 1600cc flat 4 air-cooled motor.
Though the required octane is 90 as a regular fuel, specially included cleaning material taking effect and the performance of the motor becoming better and better day by day, I may continue this 100 octane fuel not as a temporal attempt bur as a permanent use?

Almost 150,000km used BC7 SUBARU Legacy LSi US model's motor EJ22 might have any problem on the deposition of foreign material, carbon, sludge and vanish? So, the introduction of Pura 100 fuel may cause some improvement in combustion? I hope the result on the experiment.

The smaller motor may take effect apparently, so the same experiment would be interesting on 2NZ-FE TOYOTA motor in NCP10 Vitz?

As for B-Vectra and Altezza, they were give for high octane fuel by the maker's factory.

The comfort by the good combustion high octane fuel is superior to regular one, the same thing is said on passenger's automobile as well as model 10cc airplane 2 cycled motor.
High quality fuel never does harm on any motor, but low octane one invites unpredictable problems, causing rust in the worst.

The cheaper priced Shell Gas stand was found on the way to my working place, High octane Pura is soled at 136yen/L!