You're right . The cheap ozonators will crash and burn if you try to make fully ozonated olive oil. It does take 3 to 5 weeks to produce fully ozonated olive oil using a cheap ozonator if it lasts that long. However Dr Clark recommends ozonating the oil for only 20 minutes to 12 hours for the parasite mop-up. Most cheap ozonators will stand that test. Buying a cheap ozonator is never really a waste of money because the benefits of ozonated water alone are worth the price.
Hope this helps