... , we recommend you can drive on the low-grade for the initial stage, then improve slowly, about 15 days ... the best.After installation, keep no moving for 8 hours, then drive for about 1 hour to reach the fuel ... oil! After entering into the tank for 1 hour under dynamic or static for 8 hours, all the fuel can ... 10.packing:11,more product detail: China high quality powerful magnetic fuel saver for car