Our shipping quotes are typically valid for only 7 to 14 days. If a CIF contract is signed and there are significant fluctuations in shipping costs due to war surcharges or route changes imposed by the shipping company before the vehicle is actually loaded, we will transparently provide you with the official price increase notice from the shipping company. At that point, we reserve the right to renegotiate the freight difference or allow you to change the trade terms to FOB, letting you designate your own freight forwarder for booking.

All our measuring instruments (especially calipers, paint thickness gauges, and refrigerant pressure gauges) are calibrated quarterly according to ISO quality management system requirements to ensure the data we provide you is objective, accurate, and reliable.

We use two steps: 1. Insert a medical-grade endoscope through the spark plug hole to visually inspect cylinder wall scratches and carbon buildup on the piston top; 2. Extract an engine oil sample to check for large metal debris or emulsification (caused by coolant leakage).